As long as critical cable lengths are maintained, and the amps are same
manufacturer, it should be 'close enough' on HF.
You'd lose a little in phase difference, but not a lot. I have not thought
about how to tune the individual amps, which might prove to be challenging.
George/K0IW
On Aug 24, 2012, at 10:57 AM, Jerry Kaidor wrote:
>> How do you ensure phase matching between the amplifiers?
>
> *** Well, they're both fed with the same signal. If they're the same
> sort of amp, tuned the same, the phase should be the same, right?
>
> - Jerry Kaidor, KF6VB
>
>>
>>
>>
>>
>>
>> ========================================
>> Message Received: Aug 23 2012, 01:16 PM
>> From: "Sam Carpenter"
>> To: amps@contesting.com
>> Cc:
>> Subject: [Amps] Multi-Amp w/ Power Combiners
>>
>> I have often thought of why I do not see the running of multiple HF Tube
>> amps with power combining networks. It would seem that the overall cost of
>> using more than one smaller amplifier would be a net savings because of
>> the
>> relatively low cost of building medium power amps. It seems like a
>> reasonable way to build a lot of power and spread the stress of a system
>> out
>> a bit to lower priced components. It also partially eliminates the single
>> point of failure to take all the power down with a single glitch. I
>> understand that frequency agility would be more cumbersome and time
>> consuming, but in many applications, you don't move much. Neither input
>> nor
>> output combining is complicated so long as you are staying fairly put with
>> regard to frequency. Does anybody do this outside of broadcasting and
>> commercial? N9FUT
>>
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>> _______________________________________________
>> Amps mailing list
>> Amps@contesting.com
>> http://lists.contesting.com/mailman/listinfo/amps
>>
>
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|