[Amps] Intro and a query - which amp?

[Carl]

When a pro like Tim uses an amp he spends considerable time training his 
crew and it pays off. And has spares on hand (;

Others may wind up with a fried bandswitch which is an occassional 
problem that comes thru here. Some of the older ones seem to be having 
their share of filter cap failures and all Ameritrons have that 1N5408 
in the B- leg go at one time or another for no apparent 
reason....replace the diode and its fine for years more.

The Alpha uses a standard Centralab JV series switch, now Electroswitch. 
Wafers are fairly common at hamfests as they were used in huge numbers 
of test and industrial equipment. They can also be purchased thru 
Mouser.

Almost no amp is bulletproof and if its going to fail it will be in a 
contest or in a DX pileup!

Carl
KM1H
----- Original Message ----- 
From: "George Fremin III" <geoiii at kkn.net>
To: "Tim Duffy K3LR" <k3lr at k3lr.com>
Cc: <amps at contesting.com>
Sent: Friday, November 07, 2008 5:38 PM
Subject: Re: [Amps] Intro and a query - which amp?


> On Fri, Nov 07, 2008 at 04:29:36PM -0600, Tim Duffy K3LR wrote:
>>
>> I have had good success with the Ameritron AL1200 and AL1500.
>> Both amplifiers have worked well at 1500 watts output under contest
>> conditions without failure.
>
> I concur.
>
> I have been using AL1500 and AL1200 amps for years at various
> stations including my own and I have found to be very good
> amplifiers.
>
> I also have an Alpha 78 but parts are a problem. Tubes and in my
> case now one of the bandswitch wafers.  It is a great amp but
> I only see problems down the road.
>
>
> -- 
> George Fremin III - K5TR
> geoiii at kkn.net
> http://www.kkn.net/~k5tr
>
>
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