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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders.

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Old 3rd May 2015, 7:30 pm   #101
Norman Raeburn
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Join Date: Feb 2008
Location: Leven, Fife, Scotland
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Default Re: Mullard Valve Tester Card Project

Hi, I too have crt adaptors and cards, is there an interconnecting cable between the adaptors and tester. I have seen no reference to it. Norman
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Old 4th May 2015, 4:27 pm   #102
robot797
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Location: Enschede, Overijssel, Netherlands
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Default Re: Mullard Valve Tester Card Project

Quote:
Originally Posted by ukcol View Post
The manual for the last version of the Mullard HSVT lists 9 valve adaptors and a number of adaptors for CRTs.
ah cool
to bad it isnt as special as i thought

btw

is there any way to get a picture archief of all the card collected so far

i realy wanna make my collection complete
and i do need a lot of card for my unit (e7600/3)
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Old 4th May 2015, 7:57 pm   #103
Ed_Dinning
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Default Re: Mullard Valve Tester Card Project

Hi Norman, yes there was a short interconnect cable about 3 ft long and mine is labelled
"CRT Adaptor B".
Octal plug and free socket, appears to be 1 to 1 and 2 to 2 etc connections.

Probably used to link the tester to the set with another suitable adaptor on the set end

Ed
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Old 4th May 2015, 8:02 pm   #104
Ed_Dinning
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Default Re: Mullard Valve Tester Card Project

Hi Robot, plenty of details of all the cards issued (and numbers not issued) in this section of the forum.
I believe GMB of this forum did most of the work. There was also a design published for a card punch, so you could manufacture your own cards. The material (approx. 1mm thick SRBP) is still available, but other alternative insulators have been suggested.

Ed
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Old 4th May 2015, 9:22 pm   #105
Norman Raeburn
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Default Re: Mullard Valve Tester Card Project

Hi Ed, Thanks for the info regarding the crt tests. The tester I have belonged to my old work place and I can't recall ever seeing a cable. Norman
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Old 25th Jan 2016, 4:58 pm   #106
Ed_Dinning
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Default Re: Mullard Valve Tester Card Project

Hi Folks, as mentioned earlier, there was a card punch design for the HSVT, I was looking for my copy for another member but cannot find it.
has anyone got a link to this piece of kit?

Thanks, Ed
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Old 1st Feb 2016, 9:53 am   #107
frankmcvey
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Default Re: Mullard Valve Tester Card Project

Hi, Ed,

There's a pic and a brief write-up on the punch that Stan designed here.

Cheers,

Frank
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Old 1st Feb 2016, 8:27 pm   #108
Ed_Dinning
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Default Re: Mullard Valve Tester Card Project

Hi Frank, thanks for that, I think Ken was also looking for the data as well.

I have the gauge plate and silver steel for the punch, but it is still on the TUIT pile!

Ed
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Old 6th Feb 2016, 12:30 pm   #109
frankmcvey
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Default Re: Mullard Valve Tester Card Project

Gauge plate - serious stuff! I'm in the process of doing one, but it'll just be in MS - initially at least - with a 7mm silver steel punch.

My younger brother runs a small engineering business in Dalbeattie. He's had the CAD drawings for a punch jig drawn up, but I'm still waiting for him to make it.

How do you plan to do the punch? I'm wondering if a sinusoidal cutting edge similar to the old Q-Max chassis hole cutters (drawing attached) would give a cleaner hole, rather than just a brute-force flat-ended punch.

Cheers,

Frank
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Old 6th Feb 2016, 8:59 pm   #110
Ed_Dinning
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Default Re: Mullard Valve Tester Card Project

Hi Frank, yes the punch will be "Q max" style, it should cut SRBP easily and not need sharpening very often. It will then shear rather than punching, so should not tear the material.

Ed
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