[PVRCNC] IC-7300 phase noise

k4qpl2 at nc.rr.com k4qpl2 at nc.rr.com
Fri Nov 4 17:57:51 EDT 2016


At the PVRCNC East meeting last night we discussed the newly popular IC-7300 which is a great performer at the price. Unfortunately, I must withdraw my full approval based on the following discovered today and posted to the IC-7300 forum:

This may not affect many people unless you do SO2R or take your IC-7300 to Field 
Day where there are phone and cw stations on the same band. 
I was testing two QRP radios on 40M CW. Both in the headphones and the band 
scopes, the K3S was inaudible on the 7300 and invisible on the band scope at any 
separation more than 10 kHz at 5W. Unfortunately, at the same 5W the IC-7300 
wipes out reception in the other radio more than 70 kHz. away. Noticeable at 200 
kHz and would probably be a major problem at 100W. Phase noise is the usual 
suspect here and that's where the cost cutting comes in. Elecraft has been 
concentrating on this for several years now. 
One might argue the problem is in the K3s receiver. I don't think so. Be aware. 
 
73, 
Jim, K4QPL 



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