[Amps] Amps Digest, Vol 94, Issue 60

[Jeff Blaine]

The metering on these amps were originally setup for 2-tubes.  The metering range was not expanded when the option for the 3rd tube 
models were introduced.  Instead, ETO came out with a mod that doubled the meter scale.  This is a factory designed mod, still 
listed on the Alpha web site.

So what you are seeing is 1200 mA in effect, not 600 ma.

Go by what the LP100 is telling you.  I don't think Scott would have built a kit and the preassembled ones from Larry are calibrated 
to a NTIS master.  The "W" to the right is the LP100 setting for peak power.  So that's a PEP number you are seeing.

The power indication in these Alpha amps are "for reference only" in the best case.  And pretty far off in the worst.  Of course, 
Scott's amp may be exceptional in that regard.  But I have an LP100 also and that's where I place my power output bets.

73, Jeff ACØC
www.ac0c.com
-----Original Message----- 
From: Mike Saculla
Sent: Saturday, October 30, 2010 6:38 PM
To: amps at contesting
Subject: Re: [Amps] Amps Digest, Vol 94, Issue 60


At first I was suspicious of the 600ma Ip too. But if the amp is being pulsed tuned, the wattmeter on top might be reading peak 
power and the amp's analog meter reading average power. Note that the amp's multimeter is set to fwd power and is only reading 1100 
watts or so.

Mike K6MDS


From: n1rj at roadrunner.com
To: Amps at contesting.com
Date: Sat, 30 Oct 2010 17:48:09 -0400
Subject: Re: [Amps] Do you think he'll get it?

Roger (K8RI) wrote:
> It a very nice looking amp, but do you think he'll get his price for
> this old Alpha 78?
>
> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=330490529382
>
> 73
>
> Roger (K8RI)
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
>
Ip of 600 ma for 1.5kw output? Something fishy!

73, Roger
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