[Milsurplus] BC-230, -430 Without AudioPhoolery

[Mike Feher]

With HV FETs (Transistors a different story) the impedances at those
frequencies would not be an issue in my opinion. You would not have to
modify a thing. Build it into a tube base with an adequate heat sink, and
plug and play - 73 - Mike

Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960




-----Original Message-----
From: milsurplus-bounces at mailman.qth.net
[mailto:milsurplus-bounces at mailman.qth.net] On Behalf Of David Stinson
Sent: Tuesday, April 20, 2010 8:55 PM
To: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] BC-230, -430 Without AudioPhoolery

Yes; I am interested in trying hi-volt FETS to sub for these tubes,
but I will not gunch-up the radio to do it.  The radio stays 
returnable to original-design.  That means I would un-hook a part
and tack in a replacement, but only in a way that can be put back.
I wouldn't make major circuit changes so if it can't be done
without re-winding or re-tapping the coils etc., I would skip it.
What do you think- Broadband Toroid auto-transformers in and out
to get the impedences right?

-----Original Message-----
>From: Al Klase <al at ar88.net>
>Sent: Apr 20, 2010 2:16 PM
>To: jfor at quik.com
>Cc: milsurplus at mailman.qth.net
>Subject: Re: [Milsurplus] BC-230, -430 Without AudioPhoolery
>
>On 4/20/2010 1:42 PM, J. Forster wrote:
>> .........Assert that it can be totally eliminated by using the lastest
type of FETs.
>>    
>
>Hi John,
>
>The problem is, that's completely true.  They'll never by it.  I wonder 
>if Dave is willing to try high-voltages FET's in that 183?
>
>Al
>
>-- 
>Al Klase - N3FRQ
>Jersey City, NJ
>http://www.skywaves.ar88.net/
>
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