[Amps] MLA-2500 Power Supply Capacity

[Gary Smith]

That is some very nice work.
73,
Gary...wa6fgi

----- Original Message ----- 
From: "Tony King - W4ZT" <amps080605 at w4zt.com>
To: <amps at contesting.com>
Sent: Wednesday, January 18, 2006 8:20 PM
Subject: Re: [Amps] MLA-2500 Power Supply Capacity


> Bob,
> 
> Lawson Summerrow, W4EMF, did a very nice conversion of the MLA-2500 to a 
> pair of 3CX800A7s. A few pictures can be seen here: 
> <http://w4emf.gs35b.com/mla2500-retro-3cx800/>
> 
> There's no other info available on that retro but the pictures should 
> give you enough to decide whether you want to take it on.
> 
> 73, Tony W4ZT
> 
> k6zz at mail.ccis.com wrote:
>> Hi Folks,
>> 
>> I could use some advice on the MLA-2500 power supply.  I'm
>> planning to put a pair of 3CX800A7's in a tubeless but
>> otherwise very good condition MLA-2500.  It seems like a
>> straightforward modification, but I am somewhat concerned
>> about comments I have seen regarding the ability of the
>> power supply to handle these tubes.  What is it about these
>> particular tubes that would put an extra strain on the power
>> supply?  If they aren't driven any harder than the original
>> 8875's or a pair of 8874's, what difference would it make? 
>> I could use different tubes but I happen to have a good pair
>> of 3CX800A7's so I'm inclined to move forward if the power
>> supply can handle it.
>> 
>> I have no desire to push the modified amplifier to power
>> levels beyond its capacity, but I would like to comfortably
>> run the amp at the legal limit if the power supply and tank
>> circuit can handle it.
>> 
>> Have you done this particular modification before?  Is the
>> power supply up to the task?  If not, what can be done to
>> improve its shortcomings?
>> 
>> 73, Bob K6ZZ
>> 
>>   
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>> 
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