[Amps] Tetrode Amplifier

[m.ford]

----- Original Message ----- 
From: "Bob Maser" <bmaser at tampabay.rr.com>
To: "AMPS" <amps at contesting.com>
Sent: Saturday, July 15, 2006 11:57 AM
Subject: [Amps] Tetrode Amplifier


> Having just about completed my modifications on the Henry 4K-Ultra, I am 
> looking for another amp project.  I have a source for some 4CX300Y tetrodes 
> and I just bought some sockets for them.  I am thinking about finding a 
> desktop amp that was commercially produced using goofy tetrodes(or triodes), 
> no longer made, and relatively cheap that I could modify to use the 
> 4CX400's.  Any recommendations?  The ideal amp would have enough room to 
> install screen and bias supplies if it were originally a triode amp.  I am 
> thinking NCL-2000.  Any out there?
> 
> Thanks,
> Bob Maser  W6TR 
>

Hello Bob.  Gee I almost missed this post. It was the NCL-2000 in caps
that caught me.

A gentleman that used to post here was involved in a lot of conversions
to 6 M for that amp. I guess he gutted them and started over. Wish I knew
it at the time because I would have inquired about the tailings. Actually I
did send an email but no joy.

I just qsyed to a new qth and have been setting up shop for a few weeks.
A few days ago I put all four working amps next to each other on the new test bench.
I still need to un box the dead one. For a brief moment I was back in 1967 at the
factory on Washington street. Summer job. Then war.

I am sorry to hear that now there is new competition for a carcass. I always wanted
to move the p/s outboard and stuff four 8122 in the same pretty box. Leave the only
clue as new logo on the front that reads NCL-4000. The recent postings about multitube
amps were very interesting with a lot of  gotchas exposed. I took notes.

Cadavers can be had and brought back to life. The ones I see on ebay are over priced.  Lot of
strange looking mods too. I have seen more than one with the screen supply brought
out to a fuse holder on the front panel. Useless front panel for my project.

You should be able to find a dead one local. "They are all dead until proven otherwise."

Mike  k1ern




 


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