ARC-5 COMMAND TRANSMITTER PART 4
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- Опубликовано: 3 окт 2024
- The ARC-5 Command set transmitter needs a power supply and in this video we take look at the traditional tube rectifier supply as well as incorporating some new solid state and switching power supply ideas.
A lot of the power supply talk went right over my head. But I'm learning.
73 Paul AA1SU
Fantastic series - all parts great - but this one was especially great because of the in depth detail on the requirements of power supply. I read Dave Stinson's articles - but it is so much easier to understand when you see it visually - thank you
My ARC5 has only been on the shelf for 10 years :) Great video!
I’d love more information on your PS for the T-22. I have just acquired a T-22 and hope to match it up with its ARC-5 receiver on 40M. 73 de WB4YDL
Check out my Radio Resources FB support Page which provides high rez schematics and photos. facebook.com/Mikrowave1/photos/pb.100063494943511.-2207520000/758931924991400/?type=3
Many thanks - I’ll need a Hammond box like yours to mount what I think is a Hammond 372HX. I have one of those 24v server switchers that I use with ARC-5 receivers, so that’s no problem. Those 4.7 ohm resistors - snubbers ?? The rest I think I have in stock - even one of those crystal red lamps. Going for it !! Is your keying line just straight fed to the rear connector ?
If the radio is unmolested, yes, connect the key to the rear. Many were modified with a front jack.
What’s the rating on those 4.7 ohm resistors, 5W ?
@jameshall5835 not critical at such low current. 1/2 to 1W
Could you explain the 4.7 ohm resistors and why they’re there in your PS. TU
Just a surge protection feel good for the older diodes. Leavem out with modern diodes like 1N5408's.
Definitely need a decent power supply to get these to work well.
I will post a schematic on the Mikrowave1 Radio Resources Facebook page.
Great information. I am looking forward to trying this.
Note that 1N5804 is only 100V PIV. I think the author meant 1N5408!
Yes. 5408
Yes 1N5408!
do you have more details on your PSU design (06:11) such as construction techniques, sourcing components etc?
Alternatively, are there any commercially available PSU's that would work?
The hefty Power Transformer is available typically for replacements for Guitar Amplifiers, such as the Hammond 372 series, if you want new and are willing to spend 100 bucks. I would rather pay 15 bucks at a ham flea market for an old military or TV transformer. 500-600 VCT are excellent and you only need about 150 mA, so any of those are plenty good. They have loads of models that could be used in the Economy mode hookup with a bridge and choke input and CT as half of the voltage for the Oscillator with a voltage divider and better yet, regulation to 220 VDC. I like using a plain old 24VDC Switching power supply capable of 3-5 Amps for the filaments and relays.
@@MIKROWAVE1 I picked up a 24v switch mode PSU capable of 6A so should be fine for 24v. I am still confused on the pins for the ARC-5 (not SCR-274) and what V & A they should be. I downloaded a copy of the army manual but I'm still not clear. Are there other good references out there?
The pinouts are absolutely different between the two.
@@MIKROWAVE1 Yes I have heard that but I was wondering if you could point me to a reference for the ARC-5 pinouts.
@@matthalsey387 Go Here to the Resource Page! This is where i put up things to support the Channel. Mike facebook.com/media/set/?vanity=Mikrowave1&set=a.758933311657928
What is the possibility of using a 250 to 300 V transformer, and a double circuit to get your high voltage, and a pair of cheep 12 V battery charger transformers in series to get your 24V?
To me you’re going to find a lot more transformers in that range, than you will find a 500 or 600 volt one, especially center taped.
Hi, I have most of the parts to construct the solid state power supply but, I'm having difficulty location the 55V Zeners. Can you please tell me specifically what I should choose?