I just did an overhaul on this very same receiver. I blew out all the dust, cleaned all controls, cleaned the air capacitor in the tuner section, replaced all bulbs with new incandescents. Put all the knobs through an ultrasonic cleaning which really made them sparkle. The front glass was broken so I replaced it with new glass. Everything works as it should, dam good sound!
Thank you for all the useful information! That's why I watch your Channel all the time, you go into great detail for instance like changing the capacitors in pairs. Or how to stereo tracks left and right Channel on the scope at a 45 degree angle. Much appreciated!
Very nice repair, and a plus for finding and installing glow lamps! Here in the Netherlands i have an almost the same receiver. The front is exactly the same, and most components are the same, but the pcb’s are different. My receiver is a Lenco R 50. Thank you for these video’s!
I am totally with you on the LED vs incandescent bulb in vintage equipment argument. I do some vintage game console modding, and a lot of people replace the red LED on their console with a blue LED. I just think it looks tacky. One place where I do run LEDs that have replaced incandescents, is in my car dome lights. The LEDs are just so much brighter at night, and the color being closer to white really helps you see the cigarette lighter you dropped on the floor at night.
Great repair! My unit is on the way, currently stuck in customs, guess that takes a few days. :/ I appreciated you testing out the balance, as I've never seen how that's done before. Great stuff.
LED filaments could be a good replacement, the main reason I like to use LEDs when possible is to reduce the heat on the surrounding plastics, many of them are becoming very brittle after all these years being heated over those bulbs. As for colored light, I believe you can still buy lacquer for incandescent bulbs, might be nice to have on hand so you can restore it to a fully authentic look. That classic green colored light is something I'd miss in a restoration like this. Anyway, great work! :)
I have had melted panel meters due to heat so changed for LED the diffused warmwhite work really well I can't tell the difference.LED's are improving all the time but I get why people want original.
an idea which I have done in the past to have colored lights use a permenant marker to apply ink to the glass part of the clear light and then the bulbs will be green or blue or red or yellow etc and they look great great job as always all the best
They were rather common for meter and dial lamps, I have them in some of my ham gear, getting a replacement is going to be a pain for the receiver though as the receiver uses 14 volt lamps, stereos and my transmitter use 8 volts (likely 6.3 off the filament line for the tube heaters).
Back when I serviced these things actively I stumbled upon a way to color clear lamps whilst shopping one day: clear colored straws. Just cut a length of the needed color, slip it over the lamp and voile'! - colored light! I wonder if you can still get straws like that... I should look next shopping trip.
`They might. It sort of depends on how tight they are around the bulb, material used, etc. They can also be split to fit larger bulbs or to just cover the front. They were OK with things years ago but I have no idea how current Chinese ones will behave. Run some tests before using in actual gear.
I've been able to use colored permanent markers and simply "color the bulb". The color seems to hold a while, but can fade over time. The straw idea was brilliant.. during the video I a was thinking of using heatshrink tubing in the way you suggested straws. However I'm affraid the heatsink wouldn't be as opaque as the plastic straws and block too much of the radiant light.
I have a Sony ST-5950 SD tuner with some dead lamps. I was thinking of using green LEDs, since the display is green. I'll take a second look now. The dial tuning indicator is a two-segment LED. When stereo is detected, the top segment lights.
I had a H H Scott 342 back in the 60’s. Great unit, one of the first all solid state receivers. Only problem was the stereo indicator lamp. It was a #49 lamp if I recall and I replaced it several times a year. Wish LED’s were around then.
I don't know Dave. I've replaced some bulbs in a couple receivers with defused leds and really couldn't tell the difference. I actually took photos to see how close the brightness was.
Vintage look is fine, but with LED's you never have to worry about changing them again... I have had bad luck with aftermarket bulbs... they seem to burn out faster than original equipment bulbs... I found that out with my equipment...where do you get yours from?
Judging from the number of failed LEDsI have kicking around here I would say the same thing about that. The key to long life incandescent bulbs is voltage. If the voltage is 6 volts, go with 8 volt bulbs not 6. That way they will last forever.
Lighting is one of the things I'd replace with (warm white) leds. Just like replacing old (leaky/shorted) capacitors, in my opinion it's justified. Replacing the bulbs with (diffused) leds saved ~35W on my old Sony receiver/amplifier (which runs 3/4th of a day). Just looks like original (I replaced one bulb at a time). Can't complain about that. Added some potmeters to finetune the amount of light.
BellPhreak I actually put led in this first and was not happy. There was 2 hot spots behind the meter it was cut from the video but I did make reference to it. I had some diffused warm white led on hand and no incandescent so I had to make a special trip to get them. As to power consumption it is neglebial, running 24/7 might add a dime a month to your power bill. I swapped out every light bulb in my house for led or fluorescent for the shop. Haven't noticed any savings to my power bill. Infact it has gone up as the price of electricity has gone up. If the led had looked as good they qouks have stayed and the diffused dial part they looked fine but the meters were uneven so I went original .
BellPhreak 35 watts? You sure about that. They don't draw that much. About 150 ma each at 6 volts. Total draw was 1.2 amps at 6 volts. That's 7.2 watts. Running 24 hours that would be 172 watt hours. At my electricity rate here of .08 per kwh that would cost me 0.013 to run these lamps for 24 hours. Now tell me how much will you save running led in here. If you want to dispute something put some numbers up to back your claim up but on this receiver 6, 6 volts panel lamps adds 7 watts to the total power consumption. As to capacitors if they are bad then they need to be changed however most never fail. This has been a problem in switching power supply equipment where they are running at high temperature and stress and the newer environmentally friendly electrolytic. The older ones, that may contain toxic material generally were exceptionally reliable especially in low voltage circuits. The rip off servicers are the ones that started this "overhaul" of replacing every cap policy to pad the bill just like the crooked mechanics that tell you that you need to have your engine "flushed" before putting in new oil. Again if they are leaking, then yes they have to go, especially in tube gear as they go electrically leaky due to the high voltages that they operate at and the old paper breaks down. In tube gear that can damage tubes and overheat transformer windings causing failures of transformers. But on solid state gear this is rarely a problem. They do fail from time to time, but not every one needs to be shotgun replaced. The exception is for the audiophools that bring me an exotic amp and say replace every cap, spare no expense. One guy even supplied all the caps with his rogue amp. No video of that overhaul at the owners request.
@12voltvids: I thought they where 5w * 7 bulbs, but I'll guess that was another amplifier (not mine) which I modified. According the schematic (Sony STR-11L) it might be 3x 0.3A @ 8V = 7.2 watt. Which is still a lot. I'd pay ~0.21 euro per kW/h (including tax and transport) somewhere in Europe. 7.2 watt at 0.21/kWh costs 13.18 euro/year for those bulbs (less since it's not running 24/7). I've modified all my electronics. All lighting in my house is done with leds, which really saves a lot of money. @JackTorse: Having the right kind of leds helps. And it depends a bit how the lightpipes/stuff is made, in the device to be modified. That's one of the reasons I've use diffused leds (white + warm white, with potmeter to change the color tone a bit). If you'd image search my amplifier you might have a bit of an impression. The pictures which aren't green. The green tint isn't visible in real life. Or maybe Sony changed the color of the amplifier lighting.
for am here around Seattle there are a few am stations that I can get that still play oldies am 880, am 1420 and am 1430. 1430 out of mt Vernon is only daytime pick up and 1420 is a night or evening one and 880 kixi is more powerful during the day then at night sadly. most of the time at night I can get only sports or simulcasted talk shows of red eye radio or coast to coast am with George Noory. sad that lots of stations that used to play music or did better talk radio have changed to sports or republican heavy news.
I havent watched the entire video yet, but one thing that concerned me a little bit is when you first turned it on. it had that low level "rumble" in the speakers even with the volume down. Almost like there was a noisy transistor in the power stage somewhere after the volume control. Odd.
How old does a radio have to be in order for it to be antique since they didn't have radios 100 years ago everything else it's 1880s and older to be officially an antique
I would say this one came out to be a beauty again, I like the Authentic look instead of it being half assed! BTW, I am tired of using compressed air cans and in the market for buying an air-compressor, what kind would be good enough and which air nozzle would be good as well?
This compressor is a small 2 gallon I believe. I forget. It found it is a dumpster at work and brought it home. All that was wrong was the circuit breaker was tripped. It was however tossed because in the industry I am in (telecom) air compressors are used to provide pressure into paper cables to keep moisture out. There s a main compressor that keeps pressure into the dryer (descendant) and if the main compressor fails, there is a backup compressor. Because these compressors protect all the cables that leave the central office, failure is not acceptable as if pressure is lost and water gets into the cable it will cost tens if not hundreds of thousands of dollars in damage. So the compressors and backups are tested on a regular basis. A single failure, like tripping a breaker, and the compressor is replaced. I don't know if the one I have came out of active service, or someone just dumped one in the bin, but it was a freebie so I am not complaining. I have the blower nozzle, and a tire chuck. I bought the starter kit with attachments and hose at Canadian Tire.
PS when I restore my own vintage items, I detail the cabinets of these items to the point where they look new again. I even use professional Auto Detailing Supplies which contains Polymers which shines and protects these babies!
faithless8888 You answered your own question. It affects the midrange. Think of it as a 3 band equalizer. Lots of units used midrange. But this comes at a cost, so most manufactures eliminated it to save costs.
Of course "real" amplifiers have no such thing. They have an attenuator AKA vlume control and that is it. 3 of my all tube amps, 2 home built and 1 commercial only have a selector and volume. The thought here is all EQ devices add color to the signal, and purists don't want anything added or removed. They want to hear the sound exactly as the recording engineer intended.
12voltvids Everyone does offcourse what he/she wants. If "audio purists" don't like to use tone controls, they simply don't have to use them. But I can also imagine people who have hearing problems, which does not allow them to hear the full "audioband" between 20hz - 20khz, they can benefit from tone controls to adjust this. By the way, music is supposed to be a fun thing. It doesn't have to be "strict". Daily life is that enough as it is :-)
Aryon Llewellyn They are not bulging. These caps have a dust cap on them. The vent is actually on the bottom of these the dust caps always look that way if I pushed on top they would flex down. That is just the way they fit. When the wrap is shrunk during manufacture it squeezes the cap and makes them flex slightly.
At least by putting in lamps of the same type gives an equal light to each area and balances things back up, just replacing the dud ones would have shown up the difference, I take it.
Yes I gathered that I am not aware of this breaking any rules. They say you can not embed commercials, but there is nothing embedded here, just background image that is part of the shot.
This was an interesting video to watch. Thanks! By the way, you are the only non-UK person I heard that pronounces the "L" in SOLDER. I have on old Scott tube amp that blew its 5AR4 rectifier tube. I bought a new one and replaced it and it blew out in 10 seconds. 35 bucks down the drain. In you opinion, do you think the unit has a major problem?
You got that right. I am awaiting 2 orders now. a set of NAB adapters so I can use 10.5" reels with my Teac reel to reel deck (don't worry you will see it once they get here) and a couple of DAC chips to fix my osciloscope X-Y clock module. They I can fix the scope I bought at the ham flea market as it killed my clock module.Bought that from the table carlson was sitting at. Don't know if it is one of his repairs or not, but there was 85 volts coming out of the input.
I have to be honest, i still like a real oscilliscope better than a digital one. But i'm an old git, so that's my bias. That's a nice unit, are the outputs something like a 2N3055 or an odd RCA number?. i've noticed that leds don't have the 270 degree coverage like real bulbs do. Old 12v Xmas tree bulbs have been handy for meter lights.
I still use my analog scope for many things. The DSO has advantages for some things, and it is convenient as it will measure voltages, frequency, duty cycles ect.
The R376 is a fantastic unit great power & sound quality . Highly recommended if you're into vintage audio !
I just did an overhaul on this very same receiver. I blew out all the dust, cleaned all controls, cleaned the air capacitor in the tuner section, replaced all bulbs with new incandescents. Put all the knobs through an ultrasonic cleaning which really made them sparkle. The front glass was broken so I replaced it with new glass. Everything works as it should, dam good sound!
Love the build quality of these
Thank you for all the useful information!
That's why I watch your Channel all the time, you go into great detail for instance like changing the capacitors in pairs. Or how to stereo tracks left and right Channel on the scope at a 45 degree angle. Much appreciated!
Very nice repair, and a plus for finding and installing glow lamps!
Here in the Netherlands i have an almost the same receiver. The front is exactly the same, and most components are the same, but the pcb’s are different.
My receiver is a Lenco R 50.
Thank you for these video’s!
I am totally with you on the LED vs incandescent bulb in vintage equipment argument. I do some vintage game console modding, and a lot of people replace the red LED on their console with a blue LED. I just think it looks tacky. One place where I do run LEDs that have replaced incandescents, is in my car dome lights. The LEDs are just so much brighter at night, and the color being closer to white really helps you see the cigarette lighter you dropped on the floor at night.
Great repair! My unit is on the way, currently stuck in customs, guess that takes a few days. :/ I appreciated you testing out the balance, as I've never seen how that's done before. Great stuff.
Now you know.
LED filaments could be a good replacement, the main reason I like to use LEDs when possible is to reduce the heat on the surrounding plastics, many of them are becoming very brittle after all these years being heated over those bulbs. As for colored light, I believe you can still buy lacquer for incandescent bulbs, might be nice to have on hand so you can restore it to a fully authentic look. That classic green colored light is something I'd miss in a restoration like this. Anyway, great work! :)
I have had melted panel meters due to heat so changed for LED the diffused warmwhite work really well I can't tell the difference.LED's are improving all the time but I get why people want original.
Great work and nice equipment!
It would be great to see a collaboration between you and LGR who is known for his love for wood-grain electronics!
an idea which I have done in the past to have colored lights use a permenant marker to apply ink to the glass part of the clear light and then the bulbs will be green or blue or red or yellow etc and they look great great job as always all the best
Neat, I have never seen those fuse lamps before. Great video, thanks.
look in any old Japanese car dome light.
@@68pishta68 My 2012 Subaru still uses that style, seen them in older Chrysler vehicles too
They were rather common for meter and dial lamps, I have them in some of my ham gear, getting a replacement is going to be a pain for the receiver though as the receiver uses 14 volt lamps, stereos and my transmitter use 8 volts (likely 6.3 off the filament line for the tube heaters).
Back when I serviced these things actively I stumbled upon a way to color clear lamps whilst shopping one day: clear colored straws. Just cut a length of the needed color, slip it over the lamp and voile'! - colored light!
I wonder if you can still get straws like that... I should look next shopping trip.
Ray Rooney, Well i never, i had never thought of that way :-D
Wouldn't the straw melt? Some bulbs get a little hot.
Ray Rooney
Yes that will do it colored straws if you can find the right color
`They might. It sort of depends on how tight they are around the bulb, material used, etc. They can also be split to fit larger bulbs or to just cover the front. They were OK with things years ago but I have no idea how current Chinese ones will behave. Run some tests before using in actual gear.
I've been able to use colored permanent markers and simply "color the bulb". The color seems to hold a while, but can fade over time. The straw idea was brilliant.. during the video I a was thinking of using heatshrink tubing in the way you suggested straws. However I'm affraid the heatsink wouldn't be as opaque as the plastic straws and block too much of the radiant light.
I have a Sony ST-5950 SD tuner with some dead lamps. I was thinking of using green LEDs, since the display is green. I'll take a second look now. The dial tuning indicator is a two-segment LED. When stereo is detected, the top segment lights.
I had a H H Scott 342 back in the 60’s. Great unit, one of the first all solid state receivers. Only problem was the stereo indicator lamp. It was a #49 lamp if I recall and I replaced it several times a year. Wish LED’s were around then.
I don't know Dave. I've replaced some bulbs in a couple receivers with defused leds and really couldn't tell the difference. I actually took photos to see how close the brightness was.
I have done it too, some look good, others have hot spots.
History well built Receiver
Very nice shape! but the dust.
Scott radios used to be the AWESOME stuff way lotsa shiny tubes
I noticed when you tested stereo/mono on your scope everything tested fine. Can you explain how you’d repair it if the stereo sound wasn’t working?
Vintage look is fine, but with LED's you never have to worry about changing them again... I have had bad luck with aftermarket bulbs... they seem to burn out faster than original equipment bulbs... I found that out with my equipment...where do you get yours from?
I agree with you. 45 year old bulb finally burns out, replace it with a new chinese one that last 2 years.
Judging from the number of failed LEDsI have kicking around here I would say the same thing about that. The key to long life incandescent bulbs is voltage. If the voltage is 6 volts, go with 8 volt bulbs not 6. That way they will last forever.
12voltvids funny you should mention 8 volt bulbs... that is what my stereo took... I tried 12 v but they were too dim imo... so I went with the 8's
bones007able
The originals lasted 40 years. Even if the replacements got out after 10 that is still 10 years or longer.
bones007able
Most devices that run 6 volts use 8 volt bulbs so they last longer.
OHHHHhhhhh YEAH......compressed air is the BEST!!!!!
Lighting is one of the things I'd replace with (warm white) leds. Just like replacing old (leaky/shorted) capacitors, in my opinion it's justified. Replacing the bulbs with (diffused) leds saved ~35W on my old Sony receiver/amplifier (which runs 3/4th of a day). Just looks like original (I replaced one bulb at a time). Can't complain about that. Added some potmeters to finetune the amount of light.
BellPhreak
I actually put led in this first and was not happy. There was 2 hot spots behind the meter it was cut from the video but I did make reference to it. I had some diffused warm white led on hand and no incandescent so I had to make a special trip to get them. As to power consumption it is neglebial, running 24/7 might add a dime a month to your power bill. I swapped out every light bulb in my house for led or fluorescent for the shop. Haven't noticed any savings to my power bill. Infact it has gone up as the price of electricity has gone up. If the led had looked as good they qouks have stayed and the diffused dial part they looked fine but the meters were uneven so I went original .
BellPhreak
35 watts? You sure about that. They don't draw that much. About 150 ma each at 6 volts. Total draw was 1.2 amps at 6 volts. That's 7.2 watts. Running 24 hours that would be 172 watt hours. At my electricity rate here of .08 per kwh that would cost me 0.013 to run these lamps for 24 hours. Now tell me how much will you save running led in here. If you want to dispute something put some numbers up to back your claim up but on this receiver 6, 6 volts panel lamps adds 7 watts to the total power consumption.
As to capacitors if they are bad then they need to be changed however most never fail. This has been a problem in switching power supply equipment where they are running at high temperature and stress and the newer environmentally friendly electrolytic. The older ones, that may contain toxic material generally were exceptionally reliable especially in low voltage circuits. The rip off servicers are the ones that started this "overhaul" of replacing every cap policy to pad the bill just like the crooked mechanics that tell you that you need to have your engine "flushed" before putting in new oil. Again if they are leaking, then yes they have to go, especially in tube gear as they go electrically leaky due to the high voltages that they operate at and the old paper breaks down. In tube gear that can damage tubes and overheat transformer windings causing failures of transformers. But on solid state gear this is rarely a problem. They do fail from time to time, but not every one needs to be shotgun replaced. The exception is for the audiophools that bring me an exotic amp and say replace every cap, spare no expense. One guy even supplied all the caps with his rogue amp. No video of that overhaul at the owners request.
LEDs just don't look the same to me. I keep all incandescent bulbs in my equipment.
@12voltvids: I thought they where 5w * 7 bulbs, but I'll guess that was another amplifier (not mine) which I modified. According the schematic (Sony STR-11L) it might be 3x 0.3A @ 8V = 7.2 watt. Which is still a lot. I'd pay ~0.21 euro per kW/h (including tax and transport) somewhere in Europe. 7.2 watt at 0.21/kWh costs 13.18 euro/year for those bulbs (less since it's not running 24/7). I've modified all my electronics. All lighting in my house is done with leds, which really saves a lot of money.
@JackTorse: Having the right kind of leds helps. And it depends a bit how the lightpipes/stuff is made, in the device to be modified. That's one of the reasons I've use diffused leds (white + warm white, with potmeter to change the color tone a bit). If you'd image search my amplifier you might have a bit of an impression. The pictures which aren't green. The green tint isn't visible in real life. Or maybe Sony changed the color of the amplifier lighting.
One control, maybe volume, sounded like a wire wound pot? Carbon tracks don't usually make such a ratchety noise, a good quality item I think.
for am here around Seattle there are a few am stations that I can get that still play oldies am 880, am 1420 and am 1430. 1430 out of mt Vernon is only daytime pick up and 1420 is a night or evening one and 880 kixi is more powerful during the day then at night sadly. most of the time at night I can get only sports or simulcasted talk shows of red eye radio or coast to coast am with George Noory. sad that lots of stations that used to play music or did better talk radio have changed to sports or republican heavy news.
rmx77
I can get 1430 here all day
lucky u I barely get it during the day and then as the day wears on it fades to nothing where I am. I guess it depends on the radio and the antenna
I havent watched the entire video yet, but one thing that concerned me a little bit is when you first turned it on. it had that low level "rumble" in the speakers even with the volume down. Almost like there was a noisy transistor in the power stage somewhere after the volume control. Odd.
How old does a radio have to be in order for it to be antique since they didn't have radios 100 years ago everything else it's 1880s and older to be officially an antique
did you know, that instead of a heat gun to activate shrinktubing, you can wipe your soldering iron over the tube to achieve the same effect.
A lighter also works.
Yes I used to use a lighter or just use my soldering iron, but I have a heat gun sitting next to me so I use it.
I would say this one came out to be a beauty again, I like the Authentic look instead of it being half assed! BTW, I am tired of using compressed air cans and in the market for buying an air-compressor, what kind would be good enough and which air nozzle would be good as well?
This compressor is a small 2 gallon I believe. I forget. It found it is a dumpster at work and brought it home. All that was wrong was the circuit breaker was tripped. It was however tossed because in the industry I am in (telecom) air compressors are used to provide pressure into paper cables to keep moisture out. There s a main compressor that keeps pressure into the dryer (descendant) and if the main compressor fails, there is a backup compressor.
Because these compressors protect all the cables that leave the central office, failure is not acceptable as if pressure is lost and water gets into the cable it will cost tens if not hundreds of thousands of dollars in damage. So the compressors and backups are tested on a regular basis. A single failure, like tripping a breaker, and the compressor is replaced. I don't know if the one I have came out of active service, or someone just dumped one in the bin, but it was a freebie so I am not complaining. I have the blower nozzle, and a tire chuck. I bought the starter kit with attachments and hose at Canadian Tire.
Dave, I have to say that repairing vintage electronics especially when it comes to Audio is worth fixing instead of today's Made in China crap!
PS when I restore my own vintage items, I detail the cabinets of these items to the point where they look new again. I even use professional Auto Detailing Supplies which contains Polymers which shines and protects these babies!
Are there any advantages of having a midrange control for the EQ? Most stereo's use only bass and treble right?
faithless8888
You answered your own question. It affects the midrange. Think of it as a 3 band equalizer. Lots of units used midrange. But this comes at a cost, so most manufactures eliminated it to save costs.
12voltvids Ok I understand now. Thank you.
Of course "real" amplifiers have no such thing. They have an attenuator AKA vlume control and that is it. 3 of my all tube amps, 2 home built and 1 commercial only have a selector and volume.
The thought here is all EQ devices add color to the signal, and purists
don't want anything added or removed. They want to hear the sound exactly as the recording engineer intended.
12voltvids Everyone does offcourse what he/she wants. If "audio purists" don't like to use tone controls, they simply don't have to use them. But I can also imagine people who have hearing problems, which does not allow them to hear the full "audioband" between 20hz - 20khz, they can benefit from tone controls to adjust this. By the way, music is supposed to be a fun thing. It doesn't have to be "strict". Daily life is that enough as it is :-)
Another home run
Rather surprising that the lamps are soldered in. Not too easy to replace. But they sure look better than LEDs!
I should show what the first attempt with LEDs looked like. I wasn't happy and t he owner wouldn't. He was very happy with how this looked.
Is it my imagination, or are the tops of the power capacitors bulging?
I was wondering exactly the same thing .. not sure if it was an illusion from the lighting. Great minds :-)
Aryon Llewellyn
They are not bulging. These caps have a dust cap on them. The vent is actually on the bottom of these the dust caps always look that way if I pushed on top they would flex down. That is just the way they fit. When the wrap is shrunk during manufacture it squeezes the cap and makes them flex slightly.
At least by putting in lamps of the same type gives an equal light to each area and balances things back up, just replacing the dud ones would have shown up the difference, I take it.
Your scrolling panhandle is interesting. Does it fit the recent rule change?
?????
i think hes talking about the LED scrolling sign with your paypal on it?
What rule change?
Yes I gathered that I am not aware of this breaking any rules.
They say you can not embed commercials, but there is nothing embedded here, just background image that is part of the shot.
This was an interesting video to watch. Thanks! By the way, you are the only non-UK person I heard that pronounces the "L" in SOLDER.
I have on old Scott tube amp that blew its 5AR4 rectifier tube. I bought a new one and replaced it and it blew out in 10 seconds. 35 bucks down the drain. In you opinion, do you think the unit has a major problem?
It has a short, thus the tube acted as a fuse and blew.
Orders from China are nuts... electronic parts... some delays as long as 5 months. Even some items from banggood take over a month.
You got that right. I am awaiting 2 orders now. a set of NAB adapters so I can use 10.5" reels with my Teac reel to reel deck (don't worry you will see it once they get here) and a couple of DAC chips to fix my osciloscope X-Y clock module. They I can fix the scope I bought at the ham flea market as it killed my clock module.Bought that from the table carlson was sitting at. Don't know if it is one of his repairs or not, but there was 85 volts coming out of the input.
How may watts is your soldering iron?
I believe it is 60 watts.
12voltvids Thanks 🙏 love your videos I’m really learning things
I have to be honest, i still like a real oscilliscope better than a digital one.
But i'm an old git, so that's my bias.
That's a nice unit, are the outputs something like a 2N3055 or an odd RCA number?.
i've noticed that leds don't have the 270 degree coverage like real bulbs do.
Old 12v Xmas tree bulbs have been handy for meter lights.
I still use my analog scope for many things. The DSO has advantages for some things, and it is convenient as it will measure voltages, frequency, duty cycles ect.
Hitachi Outputs. 2n3055's seems to me most common in cap coupled designs from the 1960's and early 70's
That oscilloscope phosphor is so bright it almost burned through _my_ monitor!
I'll say one thing, this company does not skimp on the size of the transformer,
I clean it outside, don't whant all the dust in my workschop.
Well my workshop is in a garage, so I just open the door and blow all the dust out.
I have a Hitachi Sr 903 same circuit
Nobody could sing gospel songs like elvis even Paul Simon said Elvis version of bridge over troubled water was better then his
Well he was the king of rock and roll just like Chuck berry was the father of rock and roll.
Chuck made the Beatles famous.