[ARC5] Transistorized LM

[Mike Feher]

I believe Bell Labs also made some. 73 - Mike 

Mike B. Feher, N4FS
89 Arnold Blvd.
Howell NJ 07731
908-902-3831

-----Original Message-----
From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> On Behalf Of Tom Lee
Sent: Sunday, August 31, 2025 6:10 PM
To: arc5 at mailman.qth.net
Subject: Re: [ARC5] Transistorized LM

Hi Hue,

After a little googling with variant spellings of 'tubestor', I found
this: https://www.qsl.net/kh6grt/page4/tubesters/tubesters.htm. Could this be what you were thinking of?

That site not only has schematics for tubesters, it's got a wealth of FETRON info and related articles. Even if it turns out not to be the tubestors you remember, reading the material is a great way to burn the long weekend. ;)

-- Cheers,
Tom

On 8/31/2025 2:34 PM, Hubert Miller wrote:
> I just did a quick Google search on 'tubestors' and lo, there does not 
> seem to be any info jumping right out at you. Maybe later i should try 
> another engine. I was curious how they handled dropping the B+ down 
> from tube range to FET range. I have some lit "somewhere" but only 
> like advertising, nothing revelatory about the actual innards circuit.
> These didn't seem to be on the market very long  did they ? In Frank 
> Zappa's words, they were gone like the elephant's footprints in the ocean.
> -Hue Miller
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