ADVANCE DMM2 bench voltmeter circuit wanted please - UK Vintage Radio Repair and Restoration Discussion Forum

Tim · 18th Jul 2007, 12:00 pm

Hi all.
Anyone got any service info on one of these please, as I have one with a duff nixie tube.
Also, are they any good?
Thanks
Tim

Chris55000 · 4th Oct 2007, 6:40 pm

Hi!

If they're wire-ended nixies I may be able to assist - I bought four small new ones for a clock project that I never started!

***Alternatively*** - if you're willing to send the meter to me I am willing to:-

1) Repair it with new nixies;

2) Provide a complete parts list;

3) Draw you a full set of circuit diagrams.

I believe these meters were based on an early version of the "dual slope
integration" principle, and were built on three PCBs.

If I can be of help please let me know! If you'd rather not send the meter I'll
need you to measure its original nixies so I can check if the ones I've got will fit!

By the way - is your duff nixie simply broken or physically missing, or does it appear intact and simply not glowing? If it appears intact you may simply have an o/c anode resistor!

Many thanks,

Chris Williams

Tim · 8th Oct 2007, 12:43 am

Thanks for the advice Chris.
The meter has all Nixie's present, just the left most one is completely dead (not even the decimal point works). Happily I have a wire ended spare.
Thanks for the advice re anode resistor/s. I'll give that a whirl, although I haven't actually opened the meter up yet.

Chris55000 · 31st Oct 2007, 1:32 pm

Hi!

Watch this space, a circuit might mysteriously appear...!!!

Chris Williams

Tim · 31st Oct 2007, 1:57 pm

I log in most days.
Thanks Chris(in anticipation)

Chris55000 · 5th Nov 2007, 3:49 am

Hi!

...Part 1!!!

Chris Williams

Chris55000 · 5th Nov 2007, 3:54 am

Hi!

...Part 2!!!

Chris Williams

Chris55000 · 5th Nov 2007, 4:04 am

Hi!

...Part 3!!!

Please Note! The Epson Scan Utility I used to get these pages added the "002" suffix to the DMM2 filename and Adobe Acrobat's peculiar numbering of extracted pages from a large file is why there seem to be gaps - in fact there aren't! Please let me know if anything's still missing!

Note also that I wasn't able to get hold of the "BP2" Battery Pack and "SP2" Shunts Accessories Page! Any 12-14V rechargeable battery can be used with this whilst you can probably make or buy shunts from the info supplied!

Chris Williams

Tim · 5th Nov 2007, 3:06 pm

Thanks Chris

18th Jul 2007, 12:00 pm	#1
Tim Dekatron Join Date: Jan 2003 Location: Bradford on Avon, Wiltshire, UK. Posts: 3,326	ADVANCE DMM2 bench voltmeter circuit wanted please Hi all. Anyone got any service info on one of these please, as I have one with a duff nixie tube. Also, are they any good? Thanks Tim __________________ "Nothing is as dangerous as being too modern;one is apt to grow old fashioned quite suddenly."

4th Oct 2007, 6:40 pm	#2
Chris55000 Dekatron Join Date: Aug 2007 Location: Walsall Wood, Aldridge, Walsall, UK. Posts: 3,022	Re: ADVANCE DMM2 bench voltmeter circuit wanted please Hi! If they're wire-ended nixies I may be able to assist - I bought four small new ones for a clock project that I never started! *Alternatively* - if you're willing to send the meter to me I am willing to:- 1) Repair it with new nixies; 2) Provide a complete parts list; 3) Draw you a full set of circuit diagrams. I believe these meters were based on an early version of the "dual slope integration" principle, and were built on three PCBs. If I can be of help please let me know! If you'd rather not send the meter I'll need you to measure its original nixies so I can check if the ones I've got will fit! By the way - is your duff nixie simply broken or physically missing, or does it appear intact and simply not glowing? If it appears intact you may simply have an o/c anode resistor! Many thanks, Chris Williams Last edited by Chris55000; 4th Oct 2007 at 6:52 pm. Reason: Addition!

8th Oct 2007, 12:43 am	#3
Tim Dekatron Join Date: Jan 2003 Location: Bradford on Avon, Wiltshire, UK. Posts: 3,326	Re: ADVANCE DMM2 bench voltmeter circuit wanted please Thanks for the advice Chris. The meter has all Nixie's present, just the left most one is completely dead (not even the decimal point works). Happily I have a wire ended spare. Thanks for the advice re anode resistor/s. I'll give that a whirl, although I haven't actually opened the meter up yet. __________________ "Nothing is as dangerous as being too modern;one is apt to grow old fashioned quite suddenly."

31st Oct 2007, 1:32 pm	#4
Chris55000 Dekatron Join Date: Aug 2007 Location: Walsall Wood, Aldridge, Walsall, UK. Posts: 3,022	Re: ADVANCE DMM2 bench voltmeter circuit wanted please Hi! Watch this space, a circuit might mysteriously appear...!!! Chris Williams

31st Oct 2007, 1:57 pm	#5
Tim Dekatron Join Date: Jan 2003 Location: Bradford on Avon, Wiltshire, UK. Posts: 3,326	Re: ADVANCE DMM2 bench voltmeter circuit wanted please I log in most days. Thanks Chris(in anticipation) __________________ "Nothing is as dangerous as being too modern;one is apt to grow old fashioned quite suddenly."

5th Nov 2007, 3:06 pm	#9
Tim Dekatron Join Date: Jan 2003 Location: Bradford on Avon, Wiltshire, UK. Posts: 3,326	Re: ADVANCE DMM2 bench voltmeter circuit wanted please Thanks Chris __________________ "Nothing is as dangerous as being too modern;one is apt to grow old fashioned quite suddenly."