UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio 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.

Reply
 
Thread Tools
Old 26th Apr 2010, 5:26 pm   #321
0108vesa
Diode
 
Join Date: Apr 2008
Location: Joensuu Finland
Posts: 7
Default Re: The "Sussex" Homebrew Valve Tester.

Hi!

This is my case, some recycled device. PCB is ready made and all 5 transformers are connected. Just waiting for solution for diode / rectifier testing. Frank.C gave us excellent solution for that but with my modest skills I can't calculate, what are correct values for components...

Vesa
Attached Thumbnails
Click image for larger version

Name:	Box.jpg
Views:	613
Size:	98.7 KB
ID:	34987  
0108vesa is offline   Reply With Quote
Old 26th Apr 2010, 11:31 pm   #322
FRANK.C
Heptode
 
FRANK.C's Avatar
 
Join Date: Feb 2006
Location: Roscommon, Ireland
Posts: 605
Default Re: The "Sussex" Homebrew Valve Tester.

Hi Vesa
You have a nice job done on the cabinet

I am progressing rather slowly with the Sussex.
I've done a little trial and error with the resistors and there values are working out at something like

5mA 100R
15mA 33R
30mA 16R
60mA 8R
120mA 4R
180mA 2.8R

It would have been easier if I just did the math's
I don't think a 1mA range is necessary. The above test were done with a low HT of just 15V as I haven't got that side of it working yet.
It will be sometime before I get mine finished.

Frank
FRANK.C is online now   Reply With Quote
Old 26th Apr 2010, 11:39 pm   #323
Guitarist28
Heptode
 
Guitarist28's Avatar
 
Join Date: Dec 2009
Location: Hockley, Essex, UK.
Posts: 559
Default Re: The "Sussex" Homebrew Valve Tester.

Hi Vesa,
Congratulations on your case it looks good.

Regards

Rob
Guitarist28 is offline   Reply With Quote
Old 29th Apr 2010, 6:10 pm   #324
thor1961
Triode
 
Join Date: Mar 2010
Location: Binghamton NY, USA
Posts: 15
Default Re: The "Sussex" Homebrew Valve Tester.

Here is a image of the tester based on a Hammond #1456 series enclosure, its crude at best but represents a basic layout ect... Tester Image.jpg
Attached Thumbnails
Click image for larger version

Name:	Tester Image.jpg
Views:	574
Size:	46.8 KB
ID:	35141  
thor1961 is offline   Reply With Quote
Old 29th Apr 2010, 6:16 pm   #325
lioc-2413.
Diode
 
Join Date: Jun 2008
Location: Skegness
Posts: 2
Default Re: The "Sussex" Homebrew Valve Tester.

Hi Mike Brian here OAP. I saw you valve tester in the bulletin and just had to have go.
I have a question what values are the two ZDs 11&12 can't see the value but it could be my age. I see from forum you`re on to a winner good one

Many thanks Brian Smith

Last edited by Brian R Pateman; 29th Apr 2010 at 6:21 pm. Reason: E-mail address deleted - please use PM for communication.
lioc-2413. is offline   Reply With Quote
Old 29th Apr 2010, 6:16 pm   #326
Guitarist28
Heptode
 
Guitarist28's Avatar
 
Join Date: Dec 2009
Location: Hockley, Essex, UK.
Posts: 559
Default Re: The "Sussex" Homebrew Valve Tester.

Hi Thor,
Your initial image looks good. I've had a look for a Hammond #1456 case here in the UK and I must admit (unless anyone corrects me here) I can't seem to find any for sale.

Regards

Rob
Guitarist28 is offline   Reply With Quote
Old 29th Apr 2010, 6:20 pm   #327
swordholder
Rest in Peace
 
Join Date: Aug 2009
Location: East Preston, Sussex
Posts: 162
Default Re: The "Sussex" Homebrew Valve Tester.

Hi Thor & Rob
Thor, what a superb job, that cabinet is ideal.
Rob, this is what I had in mind, make the ends,base * back from MDF and bend the ali to the shape in the Hammond box.
Mike
swordholder is offline   Reply With Quote
Old 29th Apr 2010, 6:29 pm   #328
thor1961
Triode
 
Join Date: Mar 2010
Location: Binghamton NY, USA
Posts: 15
Default Re: The "Sussex" Homebrew Valve Tester.

Rob here is a link for Farnell UK > http://uk.farnell.com/hammond/1456pk...%231456PK4BKBU Mikes idea would be probably a better way to go, but the basic dimensions can serve as a guide ect...
thor1961 is offline   Reply With Quote
Old 2nd May 2010, 1:12 pm   #329
duderduderini
Diode
 
Join Date: May 2010
Location: Albury, NSW, Australia.
Posts: 2
Default The "Sussex" Homebrew Valve Tester.

Greetings from DIY Audio.
This looks great. Sorry to jump in at page 17 but I believe boards might still be available?
Could Swordholder let me know if this is the case.. for private use only.
Is there a list of components needed? Australia is 240 Volts mains so I guess iron is the first thing
Many thanks and congrats on a great job
Nick
duderduderini is offline   Reply With Quote
Old 2nd May 2010, 1:33 pm   #330
thor1961
Triode
 
Join Date: Mar 2010
Location: Binghamton NY, USA
Posts: 15
Default Re: The "Sussex" Homebrew Valve Tester.

Has there been any revisions or modification done to the pcb to facilitate for updates like Eds transformer, the gas test and a fan ect... If so could someone post a layout either pdf or jpg and are they available for purchase ? Thanks
thor1961 is offline   Reply With Quote
Old 2nd May 2010, 4:23 pm   #331
swordholder
Rest in Peace
 
Join Date: Aug 2009
Location: East Preston, Sussex
Posts: 162
Default Re: The "Sussex" Homebrew Valve Tester.

Hi Thor.
If you look through thr posts from the beginning, there are all the details you want, includung PCBs from Martin.
If you dont understand anything, please ask.

Regards
Mike
swordholder is offline   Reply With Quote
Old 2nd May 2010, 4:28 pm   #332
swordholder
Rest in Peace
 
Join Date: Aug 2009
Location: East Preston, Sussex
Posts: 162
Default Re: The "Sussex" Homebrew Valve Tester.

Nick,
Yes as far as I know PCBs and transformer are available from Martin and Ed respectively, see previous posts (I know there are a lot to look through) but there is a great deal of information there.
The Valvetester is freely available for personal use only please, I wouldn't like it very much if commercial use was made of my design work.

Regards
Mike
swordholder is offline   Reply With Quote
Old 2nd May 2010, 5:20 pm   #333
thor1961
Triode
 
Join Date: Mar 2010
Location: Binghamton NY, USA
Posts: 15
Default Re: The "Sussex" Homebrew Valve Tester.

Swordholder, Please understand I have no commercial intention's for your extremely wonderful design ! Having looked at building a tester for over 2 yrs now, and the cost being close to $300.00 USD I simply want to construct it to the best of my ability. I had ordered a transformer from Ed which should arrive any day now, but choose to wait on the pcb till all/or if any revisions or modification's had been made. For what its worth I had probably looked at 50 plus diy based testers ! Thank-you for sharing this truly amazing design ! Thor
thor1961 is offline   Reply With Quote
Old 2nd May 2010, 7:37 pm   #334
M0XNA Neil
Tetrode
 
Join Date: Apr 2009
Location: Towcester, Northamptonshire, UK.
Posts: 92
Default Re: The "Sussex" Homebrew Valve Tester.

I have constructed and tested the chassis for my 'Sussex in a Suitcase' and have attached some pictures of my bench test set-up. Readings for an ECC83 are:

Va= 250V
Vg= -2.0V
Ia= 1.8mA
Gm= 2.0mA/V

Neil.
Attached Thumbnails
Click image for larger version

Name:	002neil.jpg
Views:	641
Size:	103.1 KB
ID:	35279   Click image for larger version

Name:	006neil..jpg
Views:	537
Size:	114.1 KB
ID:	35280   Click image for larger version

Name:	001neil.jpg
Views:	536
Size:	135.0 KB
ID:	35281  
__________________
An engineer makes for a penny what a scientist makes for a pound!
M0XNA Neil is offline   Reply With Quote
Old 2nd May 2010, 8:08 pm   #335
Guitarist28
Heptode
 
Guitarist28's Avatar
 
Join Date: Dec 2009
Location: Hockley, Essex, UK.
Posts: 559
Default Re: The "Sussex" Homebrew Valve Tester.

Hi Neil,
Looks very good and functional - I bet that you are pleased with it. I wonder if you are the first to have an operational unit?

Regards

Rob
Guitarist28 is offline   Reply With Quote
Old 2nd May 2010, 8:44 pm   #336
swordholder
Rest in Peace
 
Join Date: Aug 2009
Location: East Preston, Sussex
Posts: 162
Default Re: The "Sussex" Homebrew Valve Tester.

Neil,
Congratulations on building the Tester. I'm very pleased someone else has finished one, as you can imagine, although mine worked perfectly, it's nice for a second person to build one and confirm that mine wasn't a fluke.

Well done

Mike
swordholder is offline   Reply With Quote
Old 2nd May 2010, 8:54 pm   #337
M0XNA Neil
Tetrode
 
Join Date: Apr 2009
Location: Towcester, Northamptonshire, UK.
Posts: 92
Default Re: The "Sussex" Homebrew Valve Tester.

Thanks Rob and Mike,

Because I used major components from around my garage to build it I had to make some changes to accommodate my higher HT from the transformer I found lying around. However, the HT regulation is your original design. I have built mine with separate DVMs in the lid of the suitcase so I can have four of them to also set cathode currents on the valve guitar amps I also build as a hobby.

Neil.
__________________
An engineer makes for a penny what a scientist makes for a pound!
M0XNA Neil is offline   Reply With Quote
Old 3rd May 2010, 1:10 pm   #338
duderduderini
Diode
 
Join Date: May 2010
Location: Albury, NSW, Australia.
Posts: 2
Default How do I get in touch with

Hi Thor
I cant find a place to pm martyn and ed.. there doesnt seem to be a pm function. I guess that being a noob here that i may not have pm priveliges
but i would like to get the boards and transformer
Thanks for your help and I promise to read the posts and of course it is for private use only....
Regards
Nick
duderduderini is offline   Reply With Quote
Old 3rd May 2010, 1:16 pm   #339
Brian R Pateman
Moderator
 
Brian R Pateman's Avatar
 
Join Date: Jun 2005
Location: Western Lake District, Cumbria (CA20) - UK
Posts: 2,105
Default Re: The "Sussex" Homebrew Valve Tester.

Nick,

Now that you have a post approved you should be able to use the PM system (you will need to wait for the software to catch up with your post count).

Click on the user name and select "Send a private message to....".
__________________
Brian

Forum moderator.
Brian R Pateman is offline   Reply With Quote
Old 3rd May 2010, 7:46 pm   #340
Andymic
Tetrode
 
Join Date: Jan 2010
Location: Harrow, London, UK.
Posts: 78
Default Re: The "Sussex" Homebrew Valve Tester.

For those who've come in late.
The BOM is here http://spreadsheets.google.com/ccc?k...pfMlE&hl=en_GB

Good luck!!
Andymic is offline   Reply With Quote
Reply

Thread Tools



All times are GMT +1. The time now is 6:17 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 - 2019, vBulletin Solutions, Inc.
Copyright ©2002 - 2019, Paul Stenning.