开云体育

Just to have something new to say here....
I was watching a video on the D Lab YouTube channel in which Terry Dayton shows building a simple power supply to power a Viking 122 or Heath VF-1.
After thinking about it and where I would get transformers and choke...
I remembered I had some Heath utility power supplies from hamfests (such as for HW-101).
I knew I sold one of them at? one of the last hamfests before the Pandemic.. but still had a couple left (got them cheap, left over from the Institute for the Blind old radios when the equipment was retired). I assume are seen at hamfests....
Anyhow, there were various models of the PS23... later ones don't suit. I have one that is later which is not suitable... but the version A I do have as well will do the trick nicely
But early ones DO offer selectable 250/300 volts and 6.3 for filaments... later versions are 12 volt filament.
So... for the cost of some capacitors and about 7 diodes and a few resistors I SHOULD have a p.s. that can power my VFO 122 - keep it warmed up and less drifty? before the transmitter is turned on.
This is a warm-up project before I tackle one of the two Viking II xmtrs I acquired during the Pandemic.... I am not quite ready to tackle them yet.. post-surgery here so lifting 80 lbs. is not yet in the cards... but I will get one on the bench and ready to work on before I have to endure any follow up medical stuff.
Hoping to see the Viking II on the air by late Autumn. I have other EFJ gear (in line for attention!) that I can use the external p.s. supplied 122 on as well (Challenger, Adventurer, Navigator).?

Anyhow, I thought I would throw this out there into the ether in case there was interest piqued and anyone is wandering a hamfest wondering what might be useful.
And...I can use it (different pin out on the octal cable of course) on my Heath VF-1 once I finally get to the DX-40? rig restoration (do I really have two of them ?... not sure what lurks under my staircase sad to say....). A good idea for the Heath VFO-1 since the small rigs have pretty persnickity power offerings and borderline at that I believe.
73
Brian VE3HI? ?Toronto ON

I had to search to find the video you referenced. I found it here:


I subscribe to Terry's Patreon also. I highly recommend supporting him. He loves the EF Johnsons and does much to keep these rigs safe and on the air. I had not thought about having a separate PS for the VFO-122. To me, it lives with the Viking II that I also need to get going and get on the air. It is getting PTT installed this week.
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Dennis NS8H

This is on my to-do list. I have seen modern transformers at Mouser that'll provide both voltages. I have a VF-1 that would benefit from the power supply. It seems to work from my Drake 2-NT, and I will need it for my Viking 1.
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73 de Steve, K9NUD