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John Miles ) writes:
In article , says... I did as one poster suggested. I removed the antenna from my receiver, tuned around while transmitting, and discovered the following: (Crystal is 7110 kHz) at 3554 kHz, signal is S8 at 7110 kHz, signal is S6 at 14218 kHz, signal is S6 at 21326 kHz, signal is S7 at 28433 kHz, signal is S5 I'm probably going to rebuild this rig, without the circuit board. Many thanks to all who gave me advice on this. Any further comments are also much appreciated. Build it "ugly style" on an unbroken sheet of copper-clad board, and try a ferrite bead or two in the base and/or emitter leads of the transistors. The FAA and your local cellular-phone company will thank you. ![]() -- jm I didn't look at the pictures, but someone said something about long leads to coils and maybe variables. Sometimes it makes sense to make the circuit board used for the "ugly construction" the front panel, or at least mount it flush with the front panel. Then, all the controls can be mounted on the circuit board, near where they are connected and with the actual shaft coming out the circuit board, yet they can be accessed from the front panel. Or mount the controls 90 degrees to the front panel, but again have them mounted on the circuit board so the leads are short. Michael VE2BVW |
#3
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![]()
John Miles ) writes:
In article , says... I did as one poster suggested. I removed the antenna from my receiver, tuned around while transmitting, and discovered the following: (Crystal is 7110 kHz) at 3554 kHz, signal is S8 at 7110 kHz, signal is S6 at 14218 kHz, signal is S6 at 21326 kHz, signal is S7 at 28433 kHz, signal is S5 I'm probably going to rebuild this rig, without the circuit board. Many thanks to all who gave me advice on this. Any further comments are also much appreciated. Build it "ugly style" on an unbroken sheet of copper-clad board, and try a ferrite bead or two in the base and/or emitter leads of the transistors. The FAA and your local cellular-phone company will thank you. ![]() -- jm I didn't look at the pictures, but someone said something about long leads to coils and maybe variables. Sometimes it makes sense to make the circuit board used for the "ugly construction" the front panel, or at least mount it flush with the front panel. Then, all the controls can be mounted on the circuit board, near where they are connected and with the actual shaft coming out the circuit board, yet they can be accessed from the front panel. Or mount the controls 90 degrees to the front panel, but again have them mounted on the circuit board so the leads are short. Michael VE2BVW |
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