04-07-2020, 04:16 PM
Hi Michael.
Many thanks for the reply. Initially I tried a grid resistor of 1meg and this reduced the output by a fair margin I also tried a small forward bias and again reduced output. So after your suggestions I have now got a 10 meg from G1 to ground and an 18 meg from the diode anode to ground, this has removed the little bit of distortion on audio I have and weaker stations are now at a higher level. I did realise the DC conditions for the diode were wrong. Incidentally although I have lots of germanium diodes I don't have any 1N60's is the 1N60P a good diode as these are available on E-bay?
I also tried another set of Hi-Z phones which have a DC resistance of 2K that gives more volume than the other set that were 5.5k.
Here in Kilmarnock I can receive BBC Ulster at good volume and Spirit Radio more quietly but still with sufficient volume to listen to. I even can pick up Radio Star country but its too weak to really get any entertainment value from.
This of course is with just a ferrite rod aerial.
Many thanks for the reply. Initially I tried a grid resistor of 1meg and this reduced the output by a fair margin I also tried a small forward bias and again reduced output. So after your suggestions I have now got a 10 meg from G1 to ground and an 18 meg from the diode anode to ground, this has removed the little bit of distortion on audio I have and weaker stations are now at a higher level. I did realise the DC conditions for the diode were wrong. Incidentally although I have lots of germanium diodes I don't have any 1N60's is the 1N60P a good diode as these are available on E-bay?
I also tried another set of Hi-Z phones which have a DC resistance of 2K that gives more volume than the other set that were 5.5k.
Here in Kilmarnock I can receive BBC Ulster at good volume and Spirit Radio more quietly but still with sufficient volume to listen to. I even can pick up Radio Star country but its too weak to really get any entertainment value from.
This of course is with just a ferrite rod aerial.
