[Amps] FW: 4Z4RB amplifiers

Matt maflukey at gmail.com
Wed Jul 2 13:32:03 EDT 2014

Forgive my ignorance, but just comparing the input volts/amps to the output
would seem to indicate an efficiency of ~75%, which would indicate class C
operation.  How could these be suitable for anything other than CW?  Am I
missing something here?


-----Original Message-----
From: Amps [mailto:amps-bounces at contesting.com] On Behalf Of Bill Turner
Sent: Wednesday, July 02, 2014 9:22 AM
To: Amps
Subject: [Amps] 4Z4RB amplifiers

4Z4RB has a number of SS amp boards for sale on eBay at attractive prices,
but data on them is pretty scant. Nothing of bandwidth, IMD or duty cycle
for example.

Here's one:


and there are many others.

Does anyone have any experience with these?  With no data I am pretty leery.

Thanks in advance,

73, Bill W6WRT
dezrat at outlook.com
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