Author Topic: Tube tester  (Read 4476 times)

Offline xenithon

Tube tester
« on: January 23, 2009, 09:06:40 PM »
Hi guys. Anyone here perhaps have a tube tester? I find myself buying quite a lot of NOS tubes and have had a few lemons in the past. I am worried of putting my amp at risk so would like to use a tube tester to check for stuff like cathode leakage, shorts etc. beforehand. I was wondering if anyone has one locally and might consider letting it go; I am not too keen on importing a big heavy tester from overseas  :o

Cheers
X

Offline Hi-Phibian

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Re: Tube tester
« Reply #1 on: January 23, 2009, 11:01:24 PM »
I know of two people who own tube testers, one is was Mr Valve, the other the hobbyist credited with the ISIS design, A Hobkirk.

Part of my line up of products from moth is this little guy...



GBP300.00 though so for the serious chaps I guess. PM if interested in one of them.
« Last Edit: January 23, 2009, 11:11:12 PM by Hi-Phibian »
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Offline xenithon

Re: Tube tester
« Reply #2 on: January 23, 2009, 11:07:48 PM »
Local tube vendor? For NOS tubes? I pray do tell

Offline Hi-Phibian

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Re: Tube tester
« Reply #3 on: January 24, 2009, 04:29:07 AM »
Mr Valve business was built on NOS, before the ruskie tubes were easily available. His price list is still typically 30-40% NOS.
Croak Audio
Analogue by birth, digital by design. Mostly a StereoType though known to enjoy some Mono too  http://www.croak.co.za https://instagram.com/croakaudi

Offline ghostinthemachine

Re: Tube tester
« Reply #4 on: January 24, 2009, 10:49:48 AM »
Why not build a tester of your own?


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Offline Family_Dog

Re: Tube tester
« Reply #5 on: January 24, 2009, 11:45:43 AM »
I have an AVO Mk 4, but probably a bit far from you. Beautiful instrument, unfortunately not for sale.



-F_D



-Eric

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Offline xenithon

Re: Tube tester
« Reply #6 on: January 24, 2009, 02:14:18 PM »
That looks like a beauty!

Do you think it would be possible if, when I purchase some NOS tubes, you'd be able to test them for me? Getting a tube tester myself is likely overkill,

Offline Family_Dog

Re: Tube tester
« Reply #7 on: January 25, 2009, 10:26:14 AM »
That looks like a beauty!

Do you think it would be possible if, when I purchase some NOS tubes, you'd be able to test them for me? Getting a tube tester myself is likely overkill,

X, no problem at all.... except I am in Klerksdorp.


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Offline Ampdog

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Re: Tube tester
« Reply #8 on: March 09, 2009, 03:51:04 AM »
Why not build a tester of your own?

Just found this again. Yes, one can build one's own for far less than the commercial tube tester. If one is an audio fan, chances are you will only be interested in a few tubes - no need for the exquisite switching gear etc. of the general tester. I have done that: Sockets, one for ECCxx types, then ECF80 types, EF86, 6AU6 and power tubes almost exclusively just one socket (no switching). And an E182CC socket for myself. Large face meter, two power supply voltages (330/450V) and low current G2 voltage  (100/250V), adjustable  bias. If desired a meter back-off and push-switch for gm can be included - I did not do that.

Infrequently a commercial type was on the market for around R450, but scarce. In my case I had most of the parts lying around.
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Offline Apocalypse Boy

Re: Tube tester
« Reply #9 on: March 10, 2009, 07:36:52 PM »
I would be most interested in the design of it , I have a old PHILIPS tube stereo that needs some love , the tranny spat out it's wax so I recon it's stuffed , would love to test the glass ( Plus It sounds like a fun project, NOT that I need more 1/2 Built stuff....Allmost as bad as Gert )