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[VHFcontesting] Bias Current for Gemini 70-1K Amp

To: <Moon-Net@groups.io>, <vhfcontesting@contesting.com>
Subject: [VHFcontesting] Bias Current for Gemini 70-1K Amp
From: David R Buckwalter via VHFcontesting <vhfcontesting@contesting.com>
Reply-to: K3SK@buckwalter.co
Date: Sun, 29 Jun 2025 10:41:56 -0400
List-post: <mailto:vhfcontesting@contesting.com>
 

 

What should I see for device DC current on the Gemini 70-1K amplifier?    I
replaced the Ampleon ART1K6FH device due to failure.    With the new device
installed the DC supply to the RF deck draws 1 amp powered on at idle.  When
PTT is engaged the current rises to 2 amps.   In an earlier conversation
with Roger at the DX Shop implied 1 amp Idq was what I should see.  The 2
amp reading seems high to me, but with no technical documentation on this
amp, I have nothing to base it on.  There is an adjustment on the RF deck
that is most likely for setting Idq.   Should I set this back to 1 amp with
PTT and no RF drive?

 

 

K3SK  

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