[hpsdr] Penny PTT unkeying spike - T/R sequencing?

[Phil Harman]

Hi Tom,

Looks like you are making good progress.

Can you please confirm that the spike,

1. Only appears when using AM or FM
2. Appears at the output of Penelope and not just on the bandscope screen.

Re the "Codan Flying Doctor Radio?". I gave an HPSDR presentation last
year to the Adelaide Hills Amateur Radio Society. A number of their
members were using this PA. I suggest you contact them via their web page

http://www.ahars.com.au/

73 Phil..VK6APH

> ***** High Performance Software Defined Radio Discussion List *****
>
> Just to keep the thread updated and everyone informed, Gerd sent me a
> screen
> shot showing a Penny with the same spike that I am experiencing. He said
> he
> will look into it.  Good luck with that, Gerd!
>
> I find that with the PA db gain set above 38DB there is NO Penny lockup
> and
> no spurious images after key up. I set mine to 43db now as suggested by
> Phil.  This is a good thing and leaves only the spike issue left to solve.
>
> I am adding a small SS linear amplifier now.
>
>
> BTW, does anyone know where to find the IMD specs for the Codan linear
> amplifier  from a  "Codan Flying Doctor Radio?"  It is 0.5 watt in for 100
> watts out module and is an Australian make.
>
> Thanks.
>
> Tom, K1JJ
>
>
>
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