I've finished testing my modification for providing a CW offset when running the HT-44 and SX-117 in transceive mode under control of the receiver VFO.? This is a "no-holes" modification that's inexpensive to implement and provides true CW transceive operation.? In other words, with your slide switch in XCVR position, you can tune the receiver to a station and call him and you'll be zero beat with him (or very nearly).? Without the modification, using transceive mode on CW is useless as calling a station you hear results in you being off his frequency by a difference equal to the frequency of the tone you're listening to.? The circuitry resides on a small board mounted near the VFO capacitor leads under the SX-117 chassis.? A cable between the HT-44 octal plug and the RCA jack labeled ANT on the SX-117 connects the circuit to a N/O relay contact in the HT-44.? When the HT-44 goes to transmit, the relay causes the SX-117 VFO offset to occur.
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The mod does not affect the stability of the VFO and is easily removed.? When operating SSB in transceive mode, you unplug the cable mentioned above and then the offset does not occur.? Schematic follows.? Probably unreadable and no way to increase the size here, so if interested, let me know and I'll email it to you.
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73, Floyd - K8AC
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Floyd - K8AC
Bill (Group Owner)