HT Power supply "The Beast" - UK Vintage Radio Repair and Restoration Discussion Forum

k_yller · 10th Feb 2018, 10:04 am

Gentelmens let me introduce....

Z-5001 tube stabilized power supply
Yes-up to 1 A on 500 V - nice piece of workshop equipment
big transformer 850VA , 6 x EL500
in left top corner PCB with grid PSU 0 do 99V (sockets on back plate)
bellow small speaker -overload signaling , on left error amplifier PCB with thermostat housing.
weight over 20 kg

really "must to have"

CambridgeWorks · 10th Feb 2018, 10:22 am

Nice. Just one thing missing, a health and safety warning......about it's weight!!

ukcol · 10th Feb 2018, 11:46 am

Quote:

Originally Posted by k_yller

Yes-up to 1 A on 500 V

And lethal!!!

evingar · 10th Feb 2018, 12:51 pm

Quote:

Originally Posted by robinshack

Nice. Just one thing missing, a health and safety warning......about it's weight!!

Yer, but it's got handles - that makes it alright

Seriously though, the max output (and even quiet a bit less than max output) is enough to kill the unwary stone dead - if they connected themselves between both poles (I assume the transformer isolates).

At "the day job", this would have a list of restrictions and precautions "as long as your arm" - probably have to go on a specific training course before use (in addition to being on the "live working" register (and all the training that incurs).

Refugee · 10th Feb 2018, 1:46 pm

Yes that is very impressive and overkill for all but pro radio transmitter engineers.
All the safety warnings apply in no short order.
Has it got current limit?

M0FYA Andy · 10th Feb 2018, 2:11 pm

I'm intrigued what the intended use was.
1A is a very high current at 'only' 500 volts.
If the use was to power a powerful transmitter or linear amplifier I would have expected the voltage to be much higher - 1000v or 1500v.
Andy

Alistair D · 10th Feb 2018, 2:20 pm

More information(in Polish but Google translate works fine) can be found here.

http://www.fonar.com.pl/audio/fotki/izs5_71/izs5_71.htm

At the bottom of the page click on 'schematem' for a copy of the schematic.

Al

evingar · 10th Feb 2018, 3:23 pm

Quote:

Originally Posted by Refugee

Yes that is very impressive and overkill for all but pro radio transmitter engineers.
All the safety warnings apply in no short order.
Has it got current limit?

By the look of the front panel, a rudimentary one via presets :-

0.01 A
0.1 A
1A

I love hybrid stuff like this

k_yller · 10th Feb 2018, 3:25 pm

Quote:

Originally Posted by Alistair D

More information(in Polish but Google translate works fine) can be found here.

http://www.fonar.com.pl/audio/fotki/izs5_71/izs5_71.htm

At the bottom of the page click on 'schematem' for a copy of the schematic.

Al

izs5/71 it's bit earlier version of this PSU
with smaller transformer, EL36 valves and german transistors
at bottom of this page its a link to Z-5001 version

generally it is laboratory power supply, current limit is set by left rotary switch 0.01 -0.1-1 A

what is interesting in same case (size, design, etc) was also manufactured
laboratory power supply Z-3020 = 30 Volts 20Amps

Radio Wrangler · 10th Feb 2018, 3:37 pm

'Small transmitting valves like 807 and 6146 get you into the 800v league and anything larger soon passes 2kV. Radio transmitters are expected to run long hours, so low cathode currents are the order of the day, and the power is made up from high HT, higher than 500v. Transmitters are more tightly interwoven with their power supplies with all sorts of interlocks.

So that's probably from a lab environment. Around Huddersfield, there's the uni, Matamp out at Meltham, and I think Fescol, the electroplaters are long gone from Leeds Road.

Note that the output seems to be floating, with a separate earth connector, and there's no attendant heater output... very lab-style.

A monster with a deadly bite

David

Boom · 10th Feb 2018, 4:36 pm

Looks lethal! If the power output connectors are the type that I think they are then that alone is inviting death! All it takes is some wally to unscrew the plastic cover. I have plugs for these which extend to another banana plug socket. The metal is easily touched.

Diabolical Artificer · 10th Feb 2018, 4:41 pm

Useful PSU, a 100w valve amp takes nearly an amp, nice to have headroom. I have a 500v 3A PSU but I've never gone over an amp @ 300v. Mine was at some point at RR Vulcan in Scotland so yours possibly had a military use also.

One good thing about yours using valves is that it would be easier to fix than the one I have.

Andy.

ColinTheAmpMan1 · 10th Feb 2018, 4:56 pm

There might be a little clue in the photo in post #1. The top-right corner states "Made in Poland" and some of the other labels also seem to be in a language other than English, with the English below. So what would Poles (or anybody else, for that matter) want 500 VDC at 1 A for?
Colin.

10th Feb 2018, 10:22 am	#2
CambridgeWorks Nonode Join Date: Jun 2010 Location: Spalding, Peterborough, Cambridgeshire, UK. Posts: 2,859	Re: HT Power supply "The Beast" Nice. Just one thing missing, a health and safety warning......about it's weight!! __________________ Apprehension creeping like a tube train up your spine - Cymbaline. Film More soundtrack - Pink Floyd

10th Feb 2018, 1:46 pm	#5
Refugee Dekatron Join Date: Apr 2012 Location: Worksop, Nottinghamshire, UK. Posts: 5,554	Re: HT Power supply "The Beast" Yes that is very impressive and overkill for all but pro radio transmitter engineers. All the safety warnings apply in no short order. Has it got current limit?

10th Feb 2018, 2:11 pm	#6
M0FYA Andy Nonode Join Date: May 2007 Location: Preston, Lancashire, UK. Posts: 2,511	Re: HT Power supply "The Beast" I'm intrigued what the intended use was. 1A is a very high current at 'only' 500 volts. If the use was to power a powerful transmitter or linear amplifier I would have expected the voltage to be much higher - 1000v or 1500v. Andy

10th Feb 2018, 2:20 pm	#7
Alistair D Nonode Join Date: Jan 2010 Location: Edinburgh, UK. Posts: 2,008	Re: HT Power supply "The Beast" More information(in Polish but Google translate works fine) can be found here. http://www.fonar.com.pl/audio/fotki/izs5_71/izs5_71.htm At the bottom of the page click on 'schematem' for a copy of the schematic. Al __________________ I won't tell you how I discovered that.

10th Feb 2018, 3:37 pm	#10
Radio Wrangler Moderator Join Date: Mar 2012 Location: Fife, Scotland, UK. Posts: 22,902	Re: HT Power supply "The Beast" 'Small transmitting valves like 807 and 6146 get you into the 800v league and anything larger soon passes 2kV. Radio transmitters are expected to run long hours, so low cathode currents are the order of the day, and the power is made up from high HT, higher than 500v. Transmitters are more tightly interwoven with their power supplies with all sorts of interlocks. So that's probably from a lab environment. Around Huddersfield, there's the uni, Matamp out at Meltham, and I think Fescol, the electroplaters are long gone from Leeds Road. Note that the output seems to be floating, with a separate earth connector, and there's no attendant heater output... very lab-style. A monster with a deadly bite David __________________ Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done

10th Feb 2018, 10:04 am	#1
k_yller Pentode Join Date: Jan 2014 Location: Huddersfield, West Yorkshire, UK. Posts: 129	HT Power supply "The Beast" Gentelmens let me introduce.... Z-5001 tube stabilized power supply Yes-up to 1 A on 500 V - nice piece of workshop equipment big transformer 850VA , 6 x EL500 in left top corner PCB with grid PSU 0 do 99V (sockets on back plate) bellow small speaker -overload signaling , on left error amplifier PCB with thermostat housing. weight over 20 kg really "must to have" Attached Thumbnails

10th Feb 2018, 4:36 pm	#11
Boom Retired Dormant Member Join Date: Jan 2007 Location: Westbury, Wiltshire, UK. Posts: 2,451	Re: HT Power supply "The Beast" Looks lethal! If the power output connectors are the type that I think they are then that alone is inviting death! All it takes is some wally to unscrew the plastic cover. I have plugs for these which extend to another banana plug socket. The metal is easily touched.

10th Feb 2018, 4:41 pm	#12
Diabolical Artificer Dekatron Join Date: Jul 2009 Location: Sleaford, Lincs. UK. Posts: 7,669	Re: HT Power supply "The Beast" Useful PSU, a 100w valve amp takes nearly an amp, nice to have headroom. I have a 500v 3A PSU but I've never gone over an amp @ 300v. Mine was at some point at RR Vulcan in Scotland so yours possibly had a military use also. One good thing about yours using valves is that it would be easier to fix than the one I have. Andy. __________________ Curiosity hasn't killed this cat...so far.

10th Feb 2018, 4:56 pm	#13
ColinTheAmpMan1 Octode Join Date: Jan 2012 Location: Wimbledon, London, UK. Posts: 1,465	Re: HT Power supply "The Beast" There might be a little clue in the photo in post #1. The top-right corner states "Made in Poland" and some of the other labels also seem to be in a language other than English, with the English below. So what would Poles (or anybody else, for that matter) want 500 VDC at 1 A for? Colin.