A.P.T. TCU 250 - Power Supply 0-50V 2A - UK Vintage Radio Repair and Restoration Discussion Forum

Chaparal · 28th Jan 2015, 4:40 pm

Hello group,

I'm searching for some information
(description, schematic, manual)
about an APT TCU_250 - Power Supply 0-50V 2A

Maybe someone can help.

Thanks
Peter

tb10_flyer · 28th Jan 2015, 8:26 pm

Hi Peter,

I acquired one of these a year ago. It is working but had been slightly 'modified', had a non-original meter fitted and no manual.

However, I have several photographs of the internal layout, wiring and PCBs with my annotations and a reverse-engineered schematic. Too much to attach here but I can send them via a PM if they will prove of use to you.

Mike

Chaparal · 29th Jan 2015, 6:10 pm

Mike,
thanks for the info,
but mine is with germanium transitors (appr. 1968) Iss. 1

Peter

G6fib235 · 24th Feb 2015, 10:49 am

Hi Peter.
Name here is Tony. I also have the same TCU250 as you, mine is working but noisy, (transformer hum) and a little switch erratic. Did you find a circuit diagram or handbook.
I wonder what you problem is?. Maybe we can help each other.

Tony.

Chaparal · 26th Feb 2015, 1:52 pm

Hi Tony,
which version do you have ?

There are possible 3 versions of this type.

Main difference one or two PCB's

Peter

G6fib235 · 5th Mar 2015, 4:13 pm

Hello Peter.

My appologies, I've been away. I will open my unit and check the type.

My first time on here, and if possible will send photo's. Will contact soon.

Tony.

Hi again Peter.

The unit has one main board, and is vertical behind the front control/display panel.
Sometime since I've looked inside, a vertual nest of wires with all the discrete components, I wonder if it is the same as yours?

Tony.

Chaparal · 5th Mar 2015, 11:25 pm

Tony,

it seems that these two beasts are the same version "Issue 1"

Peter

28th Jan 2015, 4:40 pm	#1
Chaparal Hexode Join Date: Apr 2007 Location: Wiesbaden, Germany Posts: 333	A.P.T. TCU 250 - Power Supply 0-50V 2A Hello group, I'm searching for some information (description, schematic, manual) about an APT TCU_250 - Power Supply 0-50V 2A Maybe someone can help. Thanks Peter

28th Jan 2015, 8:26 pm	#2
tb10_flyer Rest in Peace Join Date: Mar 2010 Location: Heathfield, East Sussex, UK. Posts: 31	Re: A.P.T. TCU 250 - Power Supply 0-50V 2A Hi Peter, I acquired one of these a year ago. It is working but had been slightly 'modified', had a non-original meter fitted and no manual. However, I have several photographs of the internal layout, wiring and PCBs with my annotations and a reverse-engineered schematic. Too much to attach here but I can send them via a PM if they will prove of use to you. Mike

29th Jan 2015, 6:10 pm	#3
Chaparal Hexode Join Date: Apr 2007 Location: Wiesbaden, Germany Posts: 333	Re: A.P.T. TCU 250 - Power Supply 0-50V 2A Mike, thanks for the info, but mine is with germanium transitors (appr. 1968) Iss. 1 Peter

24th Feb 2015, 10:49 am	#4
G6fib235 Retired Dormant Member Join Date: Feb 2015 Location: Andover, Hampshire, UK. Posts: 2	Re: A.P.T. TCU 250 - Power Supply 0-50V 2A Hi Peter. Name here is Tony. I also have the same TCU250 as you, mine is working but noisy, (transformer hum) and a little switch erratic. Did you find a circuit diagram or handbook. I wonder what you problem is?. Maybe we can help each other. Tony.

26th Feb 2015, 1:52 pm	#5
Chaparal Hexode Join Date: Apr 2007 Location: Wiesbaden, Germany Posts: 333	Re: A.P.T. TCU 250 - Power Supply 0-50V 2A Hi Tony, which version do you have ? There are possible 3 versions of this type. Main difference one or two PCB's Peter

5th Mar 2015, 4:13 pm	#6
G6fib235 Retired Dormant Member Join Date: Feb 2015 Location: Andover, Hampshire, UK. Posts: 2	Hello Peter. My appologies, I've been away. I will open my unit and check the type. My first time on here, and if possible will send photo's. Will contact soon. Tony. Hi again Peter. The unit has one main board, and is vertical behind the front control/display panel. Sometime since I've looked inside, a vertual nest of wires with all the discrete components, I wonder if it is the same as yours? Tony.

5th Mar 2015, 11:25 pm	#7
Chaparal Hexode Join Date: Apr 2007 Location: Wiesbaden, Germany Posts: 333	Re: A.P.T. TCU 250 - Power Supply 0-50V 2A Tony, it seems that these two beasts are the same version "Issue 1" Peter