[Top] [All Lists]

Re: [Amps] ALPHAs and momentary power outages

To: "Roger" <>,"Jim Brown" <>, <>
Subject: Re: [Amps] ALPHAs and momentary power outages
From: "jeremy-ca" <>
Date: Mon, 16 Jul 2007 13:44:15 -0400
List-post: <>
A couple of 1000-1500W inverters and a big deep cycle battery ought to 
handle the load for a short time. The trick would be the transfer switching 
as well as configuring the two 120V outputs for 240V. There may also be 240V 
inverters available.

OTOH would disabling the timer and wiring the filament and plate xfmrs so 
they could be independently controlled be considered cheating? As long as 
common sense is used for turning the amp on from cold or a momentary AC 
failure there wont be any damage to the tubes. I have a NCL-2000 I converted 
to 6M in 1964 and the time delay tube has been dead for decades. (current 
price is over $80) I jumpered the socket and just make sure that 2 minutes 
has elapsed before kicking on the HV. No problems and 8122's are as pricey 
as those Alphas.


----- Original Message ----- 
From: "Roger" <>
To: "Jim Brown" <>; <>
Sent: Monday, July 16, 2007 12:49 PM
Subject: Re: [Amps] ALPHAs and momentary power outages

> Yes, a proper sized UPS would work, but it has to be capable of supplying
> the peak AC power to the amp under load if that is when the power is
> interrupted rather than just the idle power.  That means a UPS capable of
> 2500 to 3000 watts peak and would probably cost as much as the Alpha. 
> Those
> in the neighborhood of a KW seem to run about a dollar a watt. I'd guess
> they get more expensive per watt much larger than that as I just looked at 
> a
> 1200 watt unit for $1,400.
>> On Mon, 16 Jul 2007 08:34:35 -0400, Paul Cassel wrote:
>>>Thanks for your ideas?
>> How about a UPS? If all we're talking about is a few seconds, one of
>> the beefier 240V models would probably have held it up.
> They really don't have any reserve capacity. Take one a tiny bit past it's
> limit and it'll just shut down, or at least all I've seen so far do.
> 73
> Roger (K8RI)
>> Jim K9YC
>> _______________________________________________
>> Amps mailing list
> _______________________________________________
> Amps mailing list

Amps mailing list

<Prev in Thread] Current Thread [Next in Thread>