[hpsdr] Possible 5 band VHF transverter?

[Phil Harman]

Hi Dick,

There are a couple of ways to do this.

1. Connect directly to the output of the 122.88MHz VCXO on pin 3.  I suggest 
you do this via a low value capacitor (say 4.7pf) into a length of small 
diameter 50 ohm coax.  You can then amplify the LO level externally to the 
level required for your mixer.

2. Bring the 122.88 MHz signal out to one of the pins on J14.  This will 
mean the loss of one of the DEBUG_LEDS since they share J14 pins but has the 
advantage that no soldering is required.  Connect to the pin and ground  as 
per the above.

73 Phil...VK6APH



-----Original Message----- 
From: Dick Faust
Sent: Sunday, March 17, 2013 4:37 AM
To: HPSDR
Subject: Re: [hpsdr] Possible 5 band VHF transverter?

***** High Performance Software Defined Radio Discussion List *****

Hi Phil

It would be beneficial if the 122.88 MHz phase locked signal were
available to use with a simple 2M circuit like/similar to the one  Paul
Wade W1GHZ describes as Miniverter-F
www.w1ghz.org/small_proj/Miniverter_F.zip
and available from Down East Microwave as a kit
http://www.downeastmicrowave.com/ghzmini.htm

This approach would be quite simple to get to 144MHz, especially if one
has a PA with a receive preamp.
The other bands may be able to use with a multiplier circuit [ie 122.88
x3 = 368.64 & would yield a 146.64MHZ IF for 222MHz].

The 5 band unit would probably need more signals to phase lock an
oscillator like the ones mentioned in the other posts.  I can not
determine where or how the phase lock signals originate or how to access
from the Hermes schematics.

Thanks 73
Dick K9IVB

Phil Harman wrote:
> Hi Dick,
>
> What actual signals do you need from Hermes since there are some spare IO
> pins that it may be possible to route them to?
>
> 73 Phil...VK6APH
>
> -----Original Message----- From: Dick Faust
> Sent: Saturday, March 16, 2013 9:27 AM
> To: hpsdr at lists.openhpsdr.org
> Subject: Re: [hpsdr] Possible 5 band VHF transverter?
>
> ***** High Performance Software Defined Radio Discussion List *****
>
> Fortunately, or unfortunately, I already know that it is not yet
> possible to use Hermes signal sources for external PLL synthesizer.
> What I was looking for is the proposed method to be considered to
> actually use those signals.
>
> Dick K9IVB
>
> Helmut, DC6NY wrote:
>> Hi Dick,
>>
>> Hermes does not provide additional PLL capability yet, but it is possible 
>> to use Hermes signal sources as reference for external PLL synthesizer.
>>
>> 73, Helmut, DC6NY
>> -----Ursprüngliche Nachricht-----
>> Von: hpsdr-bounces at lists.openhpsdr.org 
>> [mailto:hpsdr-bounces at lists.openhpsdr.org] Im Auftrag von Dick Faust
>
>> Gesendet: Freitag, 15. März 2013 21:00
>> Cc: hpsdr at lists.openhpsdr.org
>> Betreff: Re: [hpsdr] Possible 5 band VHF transverter?
>>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> Hi
>>
>> Would someone, briefly, outline how and where you can get the phase 
>> locksignals from Hermes.  The Atlas Bus boards are more obvious.
>> Thanks
>>
>> Dick K9IVB
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