Tektronix 310A - UK Vintage Radio Repair and Restoration Discussion Forum

Riccampbell · 20th Jan 2019, 5:30 pm

I was recently given a Tektronix 310A scope, two things; the on/off switch, buried in the bowels of the scope doesn't work plus when connected via a series 100W bulb the bulb lights up but nothing else. I would not have bought such an item to repair, well out of my ability, but as it came free, well you never know. Can anyone help with a schematic?

Cheers, Ric.

ajgriff · 20th Jan 2019, 5:50 pm

Should find what you need here:

http://w140.com/tekwiki/wiki/310

Alan

Riccampbell · 20th Jan 2019, 6:18 pm

Thanks Alan, just the job.

MrBungle · 20th Jan 2019, 8:31 pm

310A is a work of art. Nice bit of kit you have there.

turretslug · 20th Jan 2019, 9:51 pm

That's a delightful little thing- and that "310A Folded off internal" shot on the linked-to page is a Tekhead centrefold.

Diabolical Artificer · 21st Jan 2019, 7:08 am

Stick it somewhere warm for a week, it's probably been stored in less than ideal condition's for decades then check the mains tfmr is ok. Then it's a case of checking all your rails are present and are free of AC ripple - some of the big electrolytics might be leaky.

Don't be put off, these arn't too tricky to fix, they work the same as a simpler scope, a lot of the valves and apparent complexity is DC regulation.

Andy.

6AL5W-Martin · 23rd Jan 2019, 7:32 pm

hello Ric,

310A like to eat 175 Watts to feed the 33 tubes inside.
Your 100W bulb is ON and the scope get nothing.

greetings
Martin

dave cox · 24th Jan 2019, 5:23 pm

Try a 500W bulb

Riccampbell · 25th Jan 2019, 3:17 pm

Many thanks for the information regarding the bulb, why didn't I think of that. I will follow advice and keep you posted.
Cheers, Ric.

Riccampbell · 26th Jan 2019, 4:28 pm

My Tektronix is back in the land of the living, just some niggles to sort out. Many thanks.

turretslug · 26th Jan 2019, 5:25 pm

Good to see that, and you get a winter-warmer for the workshop to boot! I love the way that quality kit like this can just work after maybe many years of dormancy,

Colin

Diabolical Artificer · 27th Jan 2019, 7:11 am

Good to see it working, my 585A workshop heater packed up the other day, thought it was the temp protection, but isn't, time to open it up.

Andy.

6AL5W-Martin · 27th Jan 2019, 10:20 am

do not wonder to find a lot of pictures from my wellenkino in the Tek Wiki,
we are always working to make it better and better

310A is a fine scope, very amazing is the foldet cabinet construction.
See also the 316, a faster version in this format.

Hello Andy,
what is with your 585A?
You mean theere comes nothing except heating?
Check the time relais tube, 6NO45 (6 volts, normally open, 45 seconds delay)
Martin

20th Jan 2019, 5:30 pm	#1
Riccampbell Tetrode Join Date: Nov 2012 Location: Huntingdon, UK. Posts: 98	Tektronix 310A I was recently given a Tektronix 310A scope, two things; the on/off switch, buried in the bowels of the scope doesn't work plus when connected via a series 100W bulb the bulb lights up but nothing else. I would not have bought such an item to repair, well out of my ability, but as it came free, well you never know. Can anyone help with a schematic? Cheers, Ric.

20th Jan 2019, 5:50 pm	#2
ajgriff Nonode Join Date: May 2004 Location: Halifax, West Yorkshire, UK. Posts: 2,587	Re: Tektronix 310A Should find what you need here: http://w140.com/tekwiki/wiki/310 Alan

20th Jan 2019, 6:18 pm	#3
Riccampbell Tetrode Join Date: Nov 2012 Location: Huntingdon, UK. Posts: 98	Re: Tektronix 310A Thanks Alan, just the job.

20th Jan 2019, 8:31 pm	#4
MrBungle Dekatron Join Date: Jun 2016 Location: London, UK. Posts: 3,687	Re: Tektronix 310A 310A is a work of art. Nice bit of kit you have there.

20th Jan 2019, 9:51 pm	#5
turretslug Dekatron Join Date: Nov 2011 Location: Surrey, UK. Posts: 4,395	Re: Tektronix 310A That's a delightful little thing- and that "310A Folded off internal" shot on the linked-to page is a Tekhead centrefold.

21st Jan 2019, 7:08 am	#6
Diabolical Artificer Dekatron Join Date: Jul 2009 Location: Sleaford, Lincs. UK. Posts: 7,658	Re: Tektronix 310A Stick it somewhere warm for a week, it's probably been stored in less than ideal condition's for decades then check the mains tfmr is ok. Then it's a case of checking all your rails are present and are free of AC ripple - some of the big electrolytics might be leaky. Don't be put off, these arn't too tricky to fix, they work the same as a simpler scope, a lot of the valves and apparent complexity is DC regulation. Andy. __________________ Curiosity hasn't killed this cat...so far.

23rd Jan 2019, 7:32 pm	#7
6AL5W-Martin Hexode Join Date: Nov 2006 Location: Biedenkopf, [Hessen], Germany. Posts: 425	Re: Tektronix 310A hello Ric, 310A like to eat 175 Watts to feed the 33 tubes inside. Your 100W bulb is ON and the scope get nothing. greetings Martin Attached Thumbnails __________________ www.wellenkino.de Vintage Scope restorations

24th Jan 2019, 5:23 pm	#8
dave cox Nonode Join Date: Jan 2009 Location: Bristol, UK. Posts: 2,062	Re: Tektronix 310A Try a 500W bulb

25th Jan 2019, 3:17 pm	#9
Riccampbell Tetrode Join Date: Nov 2012 Location: Huntingdon, UK. Posts: 98	Re: Tektronix 310A Many thanks for the information regarding the bulb, why didn't I think of that. I will follow advice and keep you posted. Cheers, Ric.

26th Jan 2019, 4:28 pm	#10
Riccampbell Tetrode Join Date: Nov 2012 Location: Huntingdon, UK. Posts: 98	Re: Tektronix 310A My Tektronix is back in the land of the living, just some niggles to sort out. Many thanks. Attached Thumbnails

26th Jan 2019, 5:25 pm	#11
turretslug Dekatron Join Date: Nov 2011 Location: Surrey, UK. Posts: 4,395	Re: Tektronix 310A Good to see that, and you get a winter-warmer for the workshop to boot! I love the way that quality kit like this can just work after maybe many years of dormancy, Colin

27th Jan 2019, 7:11 am	#12
Diabolical Artificer Dekatron Join Date: Jul 2009 Location: Sleaford, Lincs. UK. Posts: 7,658	Re: Tektronix 310A Good to see it working, my 585A workshop heater packed up the other day, thought it was the temp protection, but isn't, time to open it up. Andy. __________________ Curiosity hasn't killed this cat...so far.

27th Jan 2019, 10:20 am	#13
6AL5W-Martin Hexode Join Date: Nov 2006 Location: Biedenkopf, [Hessen], Germany. Posts: 425	Re: Tektronix 310A do not wonder to find a lot of pictures from my wellenkino in the Tek Wiki, we are always working to make it better and better 310A is a fine scope, very amazing is the foldet cabinet construction. See also the 316, a faster version in this format. Hello Andy, what is with your 585A? You mean theere comes nothing except heating? Check the time relais tube, 6NO45 (6 volts, normally open, 45 seconds delay) Martin __________________ www.wellenkino.de Vintage Scope restorations