[Elecraft] K3/K3S firmware rev. 5.32: Sub RX mismatched filter fix; "Safe" option for PTT-KEY via USB; new remote control commands; etc.

[Wayne Burdick]

Our pleasure, Mike. I'm glad it's working well for you.

73,
Wayne
N6KR


On Jul 30, 2015, at 8:31 PM, Mike Cox <mike at ab9v.us> wrote:

> I've loaded 5.32 wondering what it does for diversity reception. Here's my observations:
> 
> My radio is the K3S (built last Saturday). The mismatched filters were robbed from my old K3 (s/n 398) along with the sub Rx and transplanted into the new K3S. The "old" radio also has the new Synth boards. In that previous radio I ran diversity without the 200 Hz filter enabled in the sub receiver, using instead the stock 2.7 KHz filter which had an offset nearly identical to my main Rx 200 Hz filter.. My 200 Hz filters were not matched, having been ordered separately at different times. One is -.91 and the other is -.72 offset. In the past I had tried to set a compromise of about -.80 on both filters for reasonable diversity but then they were so poorly aligned that sensitivity and passbands suffered from being on the steep slopes of the filters. 200 Hz. filters just don't allow much latitude to compromise the offsets.
> 
> Now with FW 5.32 I'm listening through both filters at 150 Hz bandwidth in diversity mode with the filter offsets at their prescribed amounts. I'm currently listening on 30 meters. I'm hearing weaker signals gently passing between my ears very slowly with no particular rhythm and with no woosh-woosh. Those of you using diversity will know what I mean. It's great! My antennas are a 1/4 wave sloper on the main and a Pixel loop antenna on the AUX input to the sub receiver. I now don't see a real need to have the 5 pole filters matched to achieve great diversity reception. This setup is sounding great! I LOVE IT!
> 
> Without diversity reception I would not have 160 Meter DXCC from my small, noisy city lot. Now it's just gotten better.
> 
> Great job, Wayne and guys and gals! A great product just keeps getting better!
> 
> 73,
> Mike, AB9V