Symphonic was a mystery company. They made many cheap phonos including kiddy phonos and some school phonos. But at some point they made the #1260 (?) It was a mono console made of cheaper wood components . But the amp was an absolute treasure. The power transformer was large enough to have powered a cheap early 1950s +/- 13 tube b&w TV but the output tranny was bigger than the power tranny. . PP 6L6 GCs. I switched to a GZ34 rectifier and since that tubes voltage drop was less than the original 5U4 Iadded a pot and test points so I could adjust the bias and measure the bias voltage from topside. It needed new filters of course but there were no paper caps to replace in mine-all ceramics. I found an input point to bypass the tone control. I was blest to have found a second one . I use a Lafayettre tube stereo preamp . I found some 4 ohm non inductive resistors. I don't own a scope at present but I figure flattop point where potting up the preamp yielded no higher voltage reading. Using ohms law I calculated an output of 30-31 watts with fresh Russian 6l6GCs. They do a great job. Again totally unlike anything from Symphonic. Has anyone else encountered these amps? If you find one, grab it
A Job well done. The video was very helpful I'm learning a lot. Nothing compares to a vintage record player. vintage electronics are built well they can be repaired and restored.
Another fantastic video. I continue my education with each new video. Keeping the current correct in the heater motor branch is very informative Great job, thanks!
Bryan, thank you for the explanation and walk-thru of the schematic at the end of this video. I should be able to use this as a basis to modify several one-tube crystal cartridge 78rpm players I have waiting on the bench.
Shouldn't there be a cathode resistor (possibly bypassed) for the triode? If I'm thinking right the grid is currently biased at zero and that's not wanted?
Ortaphone cartridges areT4P and can take a Shure needle like that used on the MARANTZ TT143 Linear Tracking Turntable, should there be a 100k resistor from pin5 to ground on the output vacuum tube because as it stands something doesn't look right.
I have an RCA EY-2 player and I need to have the cartridge wired with the red white and black wires. the last time i sent it to the repairman who normally works on it to have a new cartridge put in. well, he took the three wires out that had been connected to the cartridge for 10 years and wired it with two wires. It doesn't sound nearly as good as it used to. the cartridge is that standard Chou denshi cartridge. Can you re wire my cartridge back to the three wire system? or do you have a video on you tube that explains how to connect the cartridge with the components underneath the turntable with the red, black and white wires?
In the video you forgot the grid resistor on the output tube. Also the second 47 ohm resistor in the power supply is not really necessary. The 47 and the 150 are effectively in series. It doesn't matter that the diode is in the middle they are in series.
I assume it was owned by a girl. They seem to take care of things better than boys. I hope that doesn't offend anyone. But it seems all the good used stuff I ever bought was owned by a female. I used to tear stuff up trying to figure out how they worked. Maybe it's not the case here. Boys taught to respect things also treated things right.
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Your electronics engineering prowess amazes me adding that tube to the chassis! I could PROBABLY, MAYBE do that but you make it look so easy!
Very nice repair and modification! That record player never had it so good!
Symphonic was a mystery company. They made many cheap phonos including kiddy phonos and some school phonos. But at some point they made the #1260 (?) It was a mono console made of cheaper wood components . But the amp was an absolute treasure. The power transformer was large enough to have powered a cheap early 1950s +/- 13 tube b&w TV but the output tranny was bigger than the power tranny. . PP 6L6 GCs. I switched to a GZ34 rectifier and since that tubes voltage drop was less than the original 5U4 Iadded a pot and test points so I could adjust the bias and measure the bias voltage from topside. It needed new filters of course but there were no paper caps to replace in mine-all ceramics. I found an input point to bypass the tone control. I was blest to have found a second one . I use a Lafayettre tube stereo preamp . I found some 4 ohm non inductive resistors. I don't own a scope at present but I figure flattop point where potting up the preamp yielded no higher voltage reading. Using ohms law I calculated an output of 30-31 watts with fresh Russian 6l6GCs. They do a great job. Again totally unlike anything from Symphonic. Has anyone else encountered these amps? If you find one, grab it
These kiddie record players were so cool in their day, I had a early 70’s one when I was little.
I think the record player sounds great,probably better now than when it, was new,another great video.
I really enjoy your videos, Bryan. You really know your stuff!
Great method for dealing with the preamp issue, and very well executed.
As far as the record player you worked on, it actually sounds good considering what it is
A Job well done. The video was very helpful I'm learning a lot. Nothing compares to a vintage record player. vintage electronics are built well they can be repaired and restored.
Another fantastic video. I continue my education with each new video. Keeping the current correct in the heater motor branch is very informative Great job, thanks!
Great point to point explanation on this circuit Bryan,,, thanks a lot.
Bryan, thank you for the explanation and walk-thru of the schematic at the end of this video. I should be able to use this as a basis to modify several one-tube crystal cartridge 78rpm players I have waiting on the bench.
please please keep doing these videos - both entertaining and informative ... there really great !!
Cute little record player!
Shouldn't there be a cathode resistor (possibly bypassed) for the triode? If I'm thinking right the grid is currently biased at zero and that's not wanted?
Ortaphone cartridges areT4P and can take a Shure needle like that used on the MARANTZ TT143 Linear Tracking Turntable, should there be a 100k resistor from pin5 to ground on the output vacuum tube because as it stands something doesn't look right.
Interesting exercise in historical redesign.
Can you share the final schematic? Curious what your plate voltage is on the 6sq7. What was your plate resistor?
I love the tone arm design.
thanks Bryan it's very helpful information
I have an RCA EY-2 player and I need to have the cartridge wired with the red white and black wires. the last time i sent it to the repairman who normally works on it to have a new cartridge put in. well, he took the three wires out that had been connected to the cartridge for 10 years and wired it with two wires. It doesn't sound nearly as good as it used to. the cartridge is that standard Chou denshi cartridge. Can you re wire my cartridge back to the three wire system? or do you have a video on you tube that explains how to connect the cartridge with the components underneath the turntable with the red, black and white wires?
Thanks for the new video. Very informative.
27:04...the screen grid isn't bypassed(?)
In the video you forgot the grid resistor on the output tube. Also the second 47 ohm resistor in the power supply is not really necessary. The 47 and the 150 are effectively in series. It doesn't matter that the diode is in the middle they are in series.
Toca discos interessante, mas o chassis completo não foi mostrado no vídeo! Rio Brasil
good job dude!
Dude, you are the master! :)
Great video
I buy some of those. cartriges and im happy with them..Chuo Denshi..
Nuce
From the era when you had to get a tetanus shot because you were stabbed by your phonograph needle
I have I symphonic 45rpm turntable and the turntable is made out of copper and one day I will restore it
ratchet5500 video's nn
I assume it was owned by a girl. They seem to take care of things better than boys. I hope that doesn't offend anyone. But it seems all the good used stuff I ever bought was owned by a female. I used to tear stuff up trying to figure out how they worked. Maybe it's not the case here. Boys taught to respect things also treated things right.
Great video.