That is interesting and it would now make sense why they did not use the 50 ohm pass thru, but created a unit specific shunt.
I will have to change mine to that value and see if it makes any difference to my test results.
Thank you Martin for your effort and thank you Steve (AZUR Electronics) for your courtesy of unveiling the secret.
Steve, KJ5RV
martin_u_fischer wrote:
toggle quoted message
Show quoted text
Hello Steve,
today I got a PM from Steve [AZUR Electronics];
he shows a "HP 11660A Tracking Generator Shunt (home made version)" on his website
and by courtesy he unveiled the secret around the component values of the 11660A.
He figures out that the 11660A contains a single shunt resistor of 54.5 Ohms.
Albeit this will constitute a gross mismatch for the 600 ohms output resistance of the TG,
it will transform the effective source resistance into exactly 50 ohms.
Voil???!
Regards
Martin
