The "Sussex" Homebrew Valve Tester. - Page 84 - UK Vintage Radio Repair and Restoration Discussion Forum

Guitarist28 · 19th Jan 2023, 4:34 pm

Having looked over this again after all this time I have decided to have another go at finishing what I've started.
Over time I have managed to get a spare Avo 9 rotary switch as used in the old Avo two panel, mk1&2 etc valve testers. I'm going to use this to replace the bulk of switches that need to be used so it should cut down some work to be done?

I do hope that I will eventually be successful.

Best Regards

Rob

Ibis 911 · 17th Mar 2023, 12:58 pm

Hello everyone,
I recently joined the forum. I've been following the sussex tube tester thread for a few years now and the time has come to start building. I would like to thank everyone who has participated in the development of such an outstanding project so far.
I started with the case, which is made of oak wood and aluminum panels. I plan to make the pin selector in the AVO VCM style with a 3D printer. I'll attach some pictures of the project next time.

Best Regards

Igor

jackrae · 25th Jun 2023, 7:04 pm

Hello everyone,
What a fabulous site and this Sussex project is proving a great challenge. I've had a quick scan through the 80+ pages and picked up lots of good tips and ideas, so many thanks to all those who have forwarded their personal variations and upgrades. Can someone please advise if the latest version of the circuit boards are still available to purchase
Kind regards
Jack MM0JYR

Ibis 911 · 26th Jun 2023, 9:08 am

Some pictures of the construction of the case. As I mentioned, it is made of wood and aluminum panels.
Making such a case is very simple and anyone can make it themselves.

Regards,
Igor.

jackrae · 10th Jul 2023, 8:34 pm

That's one beautiful piece of woodwork !

Ibis 911 · 11th Jul 2023, 6:55 am

For those having trouble powering DVMs. With this solution, you only need one free voltage between 10 and 15V on the transformer, and you can supply up to 5 DVMs.
DC/DC converters B1212S-1W are used. Each DVM is powered by 12V DC.
If you use the LM7809 instead of the LM7812 regulator, the supply voltage will be 9V DC, since the DC/DC converters transform the voltage 1:1.

Best regards,
Igor

Ed_Dinning · 11th Jul 2023, 8:04 pm

Hi Folks, I normally fit 3 windings to power DVM's, but a 4th winding can be added when it is wound.
To upgrade an existing transformer, simply add 19 turns of thin insulated wire on whatever small spaces exist round the bobbin.

Nominal voltages of these windings is 7 volts

Ed

Richardgr · 12th Aug 2023, 7:14 pm

Quote:

Originally Posted by Ibis 911

Some pictures of the construction of the case. As I mentioned, it is made of wood and aluminum panels.
Making such a case is very simple and anyone can make it themselves.

Regards,
Igor.

How is it jointed, out of interest?

Ibis 911 · 11th Sep 2023, 6:55 am

I apologize for the late reply due to the floods in Slovenia.

The wooden parts are glued together and fixed with screws. The screw holes are closed with wooden plugs so that they are not visible.

Regards,
Igor

TheJunkDr · 13th Nov 2023, 4:25 pm

Very interested in this by our departed Swordholder. I am tired of messing around with the ancient units of the day. This looks like a very good device.

19th Jan 2023, 4:34 pm	#1661
Guitarist28 Heptode Join Date: Dec 2009 Location: Hockley, Essex, UK. Posts: 575	Re: The "Sussex" Homebrew Valve Tester. Having looked over this again after all this time I have decided to have another go at finishing what I've started. Over time I have managed to get a spare Avo 9 rotary switch as used in the old Avo two panel, mk1&2 etc valve testers. I'm going to use this to replace the bulk of switches that need to be used so it should cut down some work to be done? I do hope that I will eventually be successful. Best Regards Rob

17th Mar 2023, 12:58 pm	#1662
Ibis 911 Diode Join Date: Mar 2023 Location: Kamnik, Slovenia. Posts: 4	Re: The "Sussex" Homebrew Valve Tester. Hello everyone, I recently joined the forum. I've been following the sussex tube tester thread for a few years now and the time has come to start building. I would like to thank everyone who has participated in the development of such an outstanding project so far. I started with the case, which is made of oak wood and aluminum panels. I plan to make the pin selector in the AVO VCM style with a 3D printer. I'll attach some pictures of the project next time. Best Regards Igor

25th Jun 2023, 7:04 pm	#1663
jackrae Triode Join Date: Oct 2022 Location: Langholm, Dumfries and Galloway, Scotland, UK. Posts: 21	Re: The "Sussex" Homebrew Valve Tester. Hello everyone, What a fabulous site and this Sussex project is proving a great challenge. I've had a quick scan through the 80+ pages and picked up lots of good tips and ideas, so many thanks to all those who have forwarded their personal variations and upgrades. Can someone please advise if the latest version of the circuit boards are still available to purchase Kind regards Jack MM0JYR

26th Jun 2023, 9:08 am	#1664
Ibis 911 Diode Join Date: Mar 2023 Location: Kamnik, Slovenia. Posts: 4	Re: The "Sussex" Homebrew Valve Tester. Some pictures of the construction of the case. As I mentioned, it is made of wood and aluminum panels. Making such a case is very simple and anyone can make it themselves. Regards, Igor. Attached Thumbnails

10th Jul 2023, 8:34 pm	#1665
jackrae Triode Join Date: Oct 2022 Location: Langholm, Dumfries and Galloway, Scotland, UK. Posts: 21	Re: The "Sussex" Homebrew Valve Tester. That's one beautiful piece of woodwork !

11th Jul 2023, 8:04 pm	#1667
Ed_Dinning Dekatron Join Date: Jan 2004 Location: Newcastle upon Tyne, Tyne & Wear, UK. Posts: 8,023	Re: The "Sussex" Homebrew Valve Tester. Hi Folks, I normally fit 3 windings to power DVM's, but a 4th winding can be added when it is wound. To upgrade an existing transformer, simply add 19 turns of thin insulated wire on whatever small spaces exist round the bobbin. Nominal voltages of these windings is 7 volts Ed

11th Sep 2023, 6:55 am	#1669
Ibis 911 Diode Join Date: Mar 2023 Location: Kamnik, Slovenia. Posts: 4	Re: The "Sussex" Homebrew Valve Tester. I apologize for the late reply due to the floods in Slovenia. The wooden parts are glued together and fixed with screws. The screw holes are closed with wooden plugs so that they are not visible. Regards, Igor

13th Nov 2023, 4:25 pm	#1670
TheJunkDr Diode Join Date: Nov 2023 Location: Belleville Ontario Canada Posts: 1	Re: The "Sussex" Homebrew Valve Tester. Very interested in this by our departed Swordholder. I am tired of messing around with the ancient units of the day. This looks like a very good device.