04-27-2016, 10:08 PM
Found one in the box that I picked up at an auction a yr or so ago. Knew it was a broadcaster but didn't know it was an AES product till I saw it in there catalog a month ago.
Did try it out. Has great coverage with no ground and just an antenna. No ground loop hum. The only issue is the audio quality could be a bit better.
With this type of transmitter(using a pentagrid tube) there can be some interaction between the oscillator and modulator causing frequency shift with the audio (part of the signal is AM but there can be some FM component to the signal too) which is undesirable.
I did play with it a little added a transformer the match the impedance from the computer out (low Z) to the input grid (high Z) and some loading. Wanted to try adding a little bias to the input to see if that will improves the audio but can't seem to find my little adjustable power supply.
Terry
Did try it out. Has great coverage with no ground and just an antenna. No ground loop hum. The only issue is the audio quality could be a bit better.
With this type of transmitter(using a pentagrid tube) there can be some interaction between the oscillator and modulator causing frequency shift with the audio (part of the signal is AM but there can be some FM component to the signal too) which is undesirable.
I did play with it a little added a transformer the match the impedance from the computer out (low Z) to the input grid (high Z) and some loading. Wanted to try adding a little bias to the input to see if that will improves the audio but can't seem to find my little adjustable power supply.
Terry
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
