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Author Topic: So, a rash and crazy purchase, or a 2 metre jewel in the making?  (Read 549 times)

2E0ILY

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I would normally have  been in the pub, not buying stuff I almost certainly do not need off the Internet, but the hostelries are shut down here in the UK because of the Corona Virus outbreak. Whatever, my finger stopped wavering and hovering and a last moment bid was made resulting in this obvious, if incomplete, labour of love by a German ham, now sadly deceased, becoming mine. A two tube, 2 metre amp using a pair of G17B's with internal PSU.

I have not picked it up yet, but would welcome any comments as to whether it may have been from a known design, or, if as I suspect, it was a unique but unfinished labour of love by a gentleman with excellent machine shop skills and a desire to produce something of shiny machined alloy beauty? Will it ever work, or will I be left with an ornament that will become testament to too much time on my hands browsing web sites during the virus lock down? ;)

The 11 photos can be seen in the Zip file at http://www.chriswilson.tv/2m-amp.zip
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Best regards, Chris Wilson.

KT4WO

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Re: So, a rash and crazy purchase, or a 2 metre jewel in the making?
« Reply #1 on: May 18, 2020, 05:26:39 PM »

Can't answer your ?'s ...but man is that some beautiful workmanship!!!
I hope you can get is working.

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K6UJ

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Re: So, a rash and crazy purchase, or a 2 metre jewel in the making?
« Reply #2 on: May 18, 2020, 07:35:59 PM »

I agree, beautiful workmanship !   Please keep us posted.

Bob
K6UJ
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W6UXB

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Re: So, a rash and crazy purchase, or a 2 metre jewel in the making?
« Reply #3 on: May 18, 2020, 07:58:15 PM »

Brilliant purchase mate, good luck with it, just the sort of thing I would buy even if I did not need it! cheers Geoff W6UXB/G3UXB
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VR2AX

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Re: So, a rash and crazy purchase, or a 2 metre jewel in the making?
« Reply #4 on: May 19, 2020, 02:28:32 AM »

The design looks to be a fairly reliable standard one that was circulating 10 years or more ago. Compare the two valve design in this site:

http://www.gd0tep.com/amplifiers/piglet/piglet-gi7b-on-6m.htm

If the amp has been out of use for a while the valves can possibly do with gettering. There is lots of info on the internet about bettering to de-gassing this type. Basically you run only filament voltage with no HV for around 24 hours. Fan cooling must be on. If you can bring up the filament voltage in stages with a small variac so much the better.

Good luck.

VR2Ax / GW3YGH
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