[hpsdr] Passed the smoke test

[Phil Harman]

Hi Jim,

Yes, that is what I mean, in fact it was a junk box relay. As you say real
coax relays are not cheap and not necessary.

Phil..


> Hi Phil,
>
> "50c" you mean 50 cents as in any inexpensive  12v relay? I've been
> checking
> prices of coax relays and their not cheap, thats for sure..
>
> Thx for the info
>
> Jim
>
> On Tue, Mar 16, 2010 at 9:53 PM, Phil Harman <phil at pharman.org> wrote:
>
>>      I read up on
>> > the DJ8AY TR switch but was wondering whether other home-brew
>> techniques
>> > were being used while waiting for alex, or, are people just
>> > using separate antennas for  TX and TX.
>> >
>>
>> I'm using a 50c relay operated from the open drain FET on Penny.
>>
>> > I notice people are using duplex using the KK (which I have not had
>> chance
>> > to install yet).   How are you connecting the antenna and protect the
>> > receive input?
>> >
>>
>> The relay I'm using has sufficient isolation to enable full duplex
>> operation at 100w.  I have also used separate Tx and Rx antennas - if
>> you
>> keep the Rx signal level below the point that the ADC overload does not
>> light in KK then you will be fine.
>>
>>
>>
>> > I am getting ready to build pennywhistle here and  I assume I need to
>> wait
>> > for alex before using the pennywhistle.   I am wondering however if
>> the
>> > pennywhistle or higher power amp can used while in this duplex mode?
>>
>> Yes, I use 100w without any problems.
>>
>>
>>
>> > There
>> > does not seem to be much info on how Alex will work with break-in
>> keying
>> > so
>> > I am also wondering whether this was tested and how it will work.
>> >
>>
>> The TR relay on Alex was chosen to work full break-in, I've tested it
>> and
>> it works fine.
>>
>>
>> 73's Phil...VK6APH
>>
>>
>



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