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Homebrew Equipment A place to show, design and discuss the weird and wonderful electronic creations from the hands of individual members. |
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16th May 2021, 7:31 pm | #21 |
Heptode
Join Date: Sep 2004
Location: Preston, Lancashire, UK.
Posts: 632
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Re: Big DC power supply
It was the 2m backpacker contest today. From what I thought was not a very good location where I live, I managed contacts all over with 10 watts and. 7 ele yagi. Well chuffed
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17th May 2021, 8:53 pm | #22 |
Dekatron
Join Date: Sep 2010
Location: Cheltenham, Gloucestershire, UK.
Posts: 3,077
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Re: Big DC power supply
When I was first licensed I spent a fair bit of time on 2m SSB and I used an 8 ele beam and 10W.
Some of the inspiration for the Goodier/Warc PSU probably came from the earlier Marchwood PSU design first shown in PW in June 1983. https://worldradiohistory.com/UK/Pra...01983%2006.pdf Some parts of the circuit look to be the same and there's some useful info in the PW pages. I think it appeared in several issues of PW that year. I'd be interested to see what display you choose for the front panel. There is a pilot hole in the front panel on mine but I never got around to buying a suitable meter.
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Regards, Jeremy G0HZU |
17th May 2021, 9:53 pm | #23 |
Heptode
Join Date: Sep 2004
Location: Preston, Lancashire, UK.
Posts: 632
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Re: Big DC power supply
Annoyingly, I did have a beautiful pair of Sifam meters and a shunt that got thrown out in a clear out years ago, when I decided I was too busy to play radio any more. I've gone down the cheap Chinesium route, will report back on whether they are any good.
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18th May 2021, 3:39 am | #24 |
Nonode
Join Date: Oct 2010
Location: Tintinara, South Australia, Australia
Posts: 2,340
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Re: Big DC power supply
I've used those, they are 'OK' as long as you don't mind a little inaccuracy on the readings.
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18th May 2021, 9:57 pm | #25 |
Pentode
Join Date: Nov 2018
Location: Freckleton, Lancashire, UK.
Posts: 232
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Re: Big DC power supply
I used similar meters on my valve AM TX and found them adequate but somewhat underdamped.
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Building and tinkering for over 50 years, from 807's to digital amateur TV. |
8th Sep 2021, 7:01 am | #26 |
Pentode
Join Date: Jul 2014
Location: Bangalore, India
Posts: 132
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Re: Big DC power supply
The comprehensive design, referred to in the original post, was quite popular in the 1990s.
A number of units were homebrewed by hams to power their 100W HF SSB rigs. They were quite reliable. The only failure encountered was with respect to the bridge rectifiers. The cause was traced to overheating on account of improper fitting of Lucar connectors.
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