UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio and TV Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Other Discussions > Homebrew Equipment

Notices

Homebrew Equipment A place to show, design and discuss the weird and wonderful electronic creations from the hands of individual members.

Closed Thread
 
Thread Tools
Old 16th May 2021, 7:31 pm   #21
Steve G4WCS
Heptode
 
Steve G4WCS's Avatar
 
Join Date: Sep 2004
Location: Preston, Lancashire, UK.
Posts: 632
Default 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
Attached Thumbnails
Click image for larger version

Name:	96CE3C15-DDED-4ADF-9004-69E98F5F3C76.jpeg
Views:	80
Size:	91.3 KB
ID:	234224  
Steve G4WCS is offline  
Old 17th May 2021, 8:53 pm   #22
G0HZU_JMR
Dekatron
 
Join Date: Sep 2010
Location: Cheltenham, Gloucestershire, UK.
Posts: 3,077
Default 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.
__________________
Regards, Jeremy G0HZU
G0HZU_JMR is offline  
Old 17th May 2021, 9:53 pm   #23
Steve G4WCS
Heptode
 
Steve G4WCS's Avatar
 
Join Date: Sep 2004
Location: Preston, Lancashire, UK.
Posts: 632
Default 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.
Attached Thumbnails
Click image for larger version

Name:	80112119-196A-4639-8D97-77E5F58B17FF.jpg
Views:	97
Size:	49.8 KB
ID:	234309  
Steve G4WCS is offline  
Old 18th May 2021, 3:39 am   #24
Terry_VK5TM
Nonode
 
Terry_VK5TM's Avatar
 
Join Date: Oct 2010
Location: Tintinara, South Australia, Australia
Posts: 2,324
Default 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.
__________________
Terry VK5TM
https://www.vk5tm.com/
Terry_VK5TM is offline  
Old 18th May 2021, 9:57 pm   #25
g4wim_tim
Pentode
 
Join Date: Nov 2018
Location: Freckleton, Lancashire, UK.
Posts: 232
Default Re: Big DC power supply

I used similar meters on my valve AM TX and found them adequate but somewhat underdamped.
__________________
Building and tinkering for over 50 years, from 807's to digital amateur TV.
g4wim_tim is offline  
Old 8th Sep 2021, 7:01 am   #26
vu2nan-nandu
Pentode
 
vu2nan-nandu's Avatar
 
Join Date: Jul 2014
Location: Bangalore, India
Posts: 132
Default 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.
__________________
https://nandustips.blogspot.com
vu2nan-nandu is online now  
Closed Thread

Thread Tools



All times are GMT +1. The time now is 3:05 pm.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Copyright ©2002 - 2023, Paul Stenning.