[Boatanchors] 4CX-350J Tubes

Mike McCarthy, W1NR lists at w1nr.net
Sun Sep 4 16:01:12 EDT 2005


One of the 60's vintage Radio Handbook's had a two tube 4CX250 amp for HF.
3 of what you got could easily do legal limit.  There are also VHF amps in
the Radio and ARRL Handbooks from the 60's and 70's, but you will probably
have to build substantial bandpass filters on the outputs to keep up with
current FCC spurious standards.

The QRO reflector and "amps at contesting.com" are good places to ask about
these tubes.

Mike, W1NR

-----Original Message-----
From: boatanchors-bounces at mailman.qth.net
[mailto:boatanchors-bounces at mailman.qth.net] On Behalf Of FRED - W4FJF
Sent: Sunday, September 04, 2005 1:15 PM
To: boatanchors at mailman.qth.net
Subject: [Boatanchors] 4CX-350J Tubes

 Good Morning All,
    I have 8 sets of 4CX-350J's (chimneys and sockets, too) and wonder what
I can do with them. 2 or 6m amps? Any ideas, or construction articles come
to mind? I wouldn't mind a good signal on 6m, so I would be really
interested in that. Any B/A amps use these tubes? I bought them from Fair
Radio Sales years ago, listed as N.O.S. RCA. Appreciate any info you can
supply. You can contact me off list at w4fjf at yahoo.com.
                   TNX FM FRED - W4FJF, 73


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