Nixie Multimeter Takeda Riken TR6155M

[astroschmidt]

Hi folks,

At our last local dorkbot-meeting I got a fully working digital multimeter with nixie tubes as display.
It's a Takeda Riken TR6155M and calibration still seems to be OK.
After cleaning up the front panel it looks like new :-)

Does anybody have technical details, service manual or any documents relating to this beautiful thing of the past?
I can't find much with google :-(

Best regards

Roger

[David Forbes]

Roger,

Congratulations on the test equipment find.

Good luck finding data for that unit. It's hard enough to find manuals
for the common-as-dirt Fluke Nixie voltmeters.

I have a cheesy, c.1972 Leader incandescent 7-segment display voltmeter
that turned up at the local surplus place. It lives on my workbench and
works great, but I don't expect to ever find a manual for it.

--
David Forbes, Tucson AZ

[Oscilloclock]

Well done on that find. I love Takeda Riken (later, "Advantest") equipment. The quality of their gear seems much, much better than Leader (another hugely popular Japanese manufacturer). I have a few nixie TR multimeters on my bench and they work wonderfully. The later nixie models tend to show up quite often.

Unfortunately, Japanese manufacturers very rarely made documentation available (even in the earlier days). I did find a mention of your TR6155 in a special article commemorating 60 years since TR/Advantest was formed, in the Semiconductor Equipment Association of Japan's "SEAJ Journal" vol.142 here: http://seaj.or.jp/journal/pdf/no142.pdf .

The mention is in the 2nd-last paragraph of section 1, where it indicates that the TR6155(/6255) was the first all-transistor multimeter that TR made. They use what might be translated as "epoch-making" for emphasis. It might be quite rare! Enjoy using it and having it on your bench!

Aaron

[Roger Leifert]

Hi Aaron,

 

THX for your investigstion.

I think I spied something that looked like a valve when taking out the cards one by one.

So perhaps it's only nearly "all-transistor"

When I open it as a showcase in our next dorkbot-meeting, I will ask someone with a decent digicam to take some photographs and later post them here.

(Don't have a digicam by myself)

 

Best regards

 

Roger