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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