[CQ-Contest] Advice about HF amplifiers

jukka.klemola at nokia.com jukka.klemola at nokia.com
Mon Sep 6 03:01:52 EDT 2004

One correction:

TL922 cooling is compromised.
The socket of the 500Zs do not get sufficient air flow.

Phenomena: the solder inside the filament pins melt.

Cure: just re-solder but add a fan.

Jukka OH6LI

> -----Original Message-----
> From: cq-contest-bounces at contesting.com
> [mailto:cq-contest-bounces at contesting.com]On Behalf Of ext 
> George Harlem
> Sent: 05 September, 2004 16:12
> To: Chris Tran ZL1CT; cq-contest at contesting.com
> Subject: Re: [CQ-Contest] Advice about HF amplifiers
> You'll get every Z-based amp in response to this!  The 
> Kenwood TL-922 meets 
> all your criteria.  It's built like a brick outhouse and has 
> great cooling.  
> Without QSK, though, it's not every op's contest amp.
> 73, George W1EBI

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