Hi i have just built a small tin box and fitted my VCO into it.
But i am thinking of useing a Feed Through Capacitor to feed the DC.
Can anyone please tell me what value it should be?
My VCo is the 1249Mhz from BATC.
Thanks Chris.....
Feed Through Capacitor
Re: Feed Through Capacitor
1000pF is a readily available value for feedthrough caps and would be suitable for this application.
Clive
Clive
Re: Feed Through Capacitor
Thanks for your fast reply, i did have that value in mind.
have got them saved in ebay...Chris.
have got them saved in ebay...Chris.
Re: Feed Through Capacitor
I have a 1000pF feedthrough on the supply (12V) and an 8V regulator inside the VCO box. I am now wondering how to filter the data lines frorm the frquency controller board which is outside the VCO. Large feedthroughs would kill the serial data and clock.
As an aside I have noticed that any RF leakage around the VCO or input to the DigiLite board will make bias settings vary. If anyone finds the bias settings seem to drift and carrier is not always well nulled it is probably RF leakage around the VCO and DigiLite board RF section.
Dick G4BBH
As an aside I have noticed that any RF leakage around the VCO or input to the DigiLite board will make bias settings vary. If anyone finds the bias settings seem to drift and carrier is not always well nulled it is probably RF leakage around the VCO and DigiLite board RF section.
Dick G4BBH
Re: Feed Through Capacitor
Hi
I have used 1000pf feed throughs for the 3 pic data lines , no problems encountered with pulse shape etc.
Richard g8byi
I have used 1000pf feed throughs for the 3 pic data lines , no problems encountered with pulse shape etc.
Richard g8byi