RadioBanter - Off Frequency FT-101

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Jean Paul

December 26th 03 03:44 PM

Off Frequency FT-101

My FT 101 I is off frequency on transmit by abt 200kc

Any suggestions as to how to synchronize the rcv and txmt

73

Jean Paul ve3jpt

N0DG	December 26th 03 09:51 PM

Is it the same for all modes (USB-LSB-CW)? My guess is that it is not. Most
transceivers of this vintage Mix Hetrodyne (band) VFO and carrier frequencys to
arrive at the Transmit or receive freq. The Hetrodyne and VFO frequencys are
the same on xmit and receive. The carrier (mode) crystals are changed to allow
for offset for USB-LSB-CW. My guess is that one of the crystals has shifted.
Use a frequency counter to locate which one and then you will probably be able
to net it via the small calibrating capacitor in the circuit.

N0DG	December 26th 03 09:51 PM

Andrew VK3BFA

December 27th 03 09:58 AM

(N0DG) wrote in message ...
Is it the same for all modes (USB-LSB-CW)? My guess is that it is not. Most
transceivers of this vintage Mix Hetrodyne (band) VFO and carrier frequencys to
arrive at the Transmit or receive freq. The Hetrodyne and VFO frequencys are
the same on xmit and receive. The carrier (mode) crystals are changed to allow
for offset for USB-LSB-CW. My guess is that one of the crystals has shifted.
Use a frequency counter to locate which one and then you will probably be able
to net it via the small calibrating capacitor in the circuit.

mmm, interesting - do you mean 200 cycles rather than 200 kilocycles?
- and have you verified this by measurement or are relying on signal
reports "on air" - depends on who is giving the report, is their radio
set up properly?

Look in the service manual for carrier osc adjustment - chances are
one of the previous owners has "fiddled" with the trimmers. BTW, the
RIT on the other persons receiver is designed to overcome minor
frequency differences....

73 de VK3BFA AAndrew

Andrew VK3BFA

December 27th 03 09:58 AM

Dale Parfitt

December 27th 03 10:37 PM

"Jean Paul" wrote in message
...
My FT 101 I is off frequency on transmit by abt 200kc

200 Kc or 200 cycles?
Any suggestions as to how to synchronize the rcv and txmt

73

Jean Paul ve3jpt

Dale Parfitt

December 27th 03 10:37 PM

"Jean Paul" wrote in message
...
My FT 101 I is off frequency on transmit by abt 200kc

200 Kc or 200 cycles?
Any suggestions as to how to synchronize the rcv and txmt

73

Jean Paul ve3jpt

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