05-03-2024, 05:30 PM
Thanks for your feedback guys.
I've joined the Hacker Radio Group and now have a copy of the service manual.
Just ordered a couple of AA x6 battery holders, so when I have the radio running on 18V I'll be able to measure emitter voltages in the oscillator & IF stages and compare with the quoted values for AF117 transistors.
DC current gain for BC557B seems to be 5 or 6 times higher than AF117.
Sensitivity and S/N ratio is amazing on this set compared to my feeble Bush VHF54.
And here are some photos...
I've joined the Hacker Radio Group and now have a copy of the service manual.
Just ordered a couple of AA x6 battery holders, so when I have the radio running on 18V I'll be able to measure emitter voltages in the oscillator & IF stages and compare with the quoted values for AF117 transistors.
DC current gain for BC557B seems to be 5 or 6 times higher than AF117.
Sensitivity and S/N ratio is amazing on this set compared to my feeble Bush VHF54.
And here are some photos...
