[Elecraft] Which Amp ?

[turnbull]

Hello Igor,    I have found that if the SWR creeps thdn the SPE 2KA transmits an excessively wide signal.
Also it generates hash on both 6 and 10 which disimproves reception.
I own this amp.
73 Doug EI2CN


Sent from my Samsung Galaxy smartphone.
-------- Original message --------From: Igor Sokolov <ua9cdc at gmail.com> Date: 24/07/2018  23:22  (GMT+00:00) To: elecraft at mailman.qth.net Subject: Re: [Elecraft] Which Amp ? 
Joe,

I do not know where the info about SPE being dirty comes from. If it is 
that bad, then why FCC had approved it?

If it is that bad, how do I manage  to use it with two radio on the same 
band and spacing of 3-5 kHz using two antennas separated 200 meters?

Last year we had 2 combo of K3 and SPE 1.3 running in Field day contest. 
Both amps where fed from the same generator and we could easily run SSB 
and CW on the same band when antennas were separated less then 200 
meters. May be other amps are even cleaner but what SPE does is more 
then enough to me.

After all, IMD of 1.3K-FA measured by ARRL (Third-order intermodulation 
distortion (IMD): 3rd/5th/7th/9th (14 MHz, 1300 W PEP):    
–31/–39/–57/–55 dB.)  is quite on par with IMD of K3 itself (Third-order 
intermodulation distortion (IMD) 3rd/5th/7th/9th order (worst case 
band):    HF, –29/–43/–46/–51 dB PEP; ) and pretty close to KPA 500 
(Third order intermodulation distortion (IMD): 3rd/5th/7th/9th: 
34/53/46/54 dB below    PEP (14 MHz, 500 W PEP output).


73, Igor UA9CDC


25.07.2018 1:03, Joe Subich, W4TV пишет:
>
> On the other hand, the SPE is no cleaner in Germany or Russia than it is
> in the US.  SPE is one of the dirtiest amateur amplifiers ever submitted
> for FCC approval and the IMD tests were only performed at about 50% of
> maximum output power.
>
> 73,
>
>    ... Joe, W4TV
>
>
> On 2018-07-24 12:51 PM, Oliver Dröse wrote:
>> Bob is in Germany and Igor in Russia. They do not have the stupid FCC 
>> limits. ;-)
>>
>> 73, Olli - DH8BQA
>>
>>
>>
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