Fraser, G4BJM wrote: I saw this mentioned on here a few days ago but I missed the original announcement, and can't see anything about it on the Elecraft site.
Can anyone enlighten me please? --------------------------------------------------- Below is the original announcement from Wayne. Ron AC7AC ----------------------- The K2's VCO (voltage-controlled oscillator) may be susceptible to low-frequency modulation by very large power transformers, such as those in linear amp power supplies and antenna rotator controllers. Such modulation can usually be eliminated by simply moving the equipment away from the transceiver. In difficult cases, magnetic shielding can be used, and we've created a modification kit for this purpose (Order #K2VCOSHLDKT). The mod kit provides a smaller replacement core for transformer T5, a high-permeability ferrite sleeve, and associated hardware. The ferrite sleeve is installed over T5, greatly reducing the effect of nearby strong magnetic fields. In addition, slug-tuned inductor L30 must be electrically disabled since it, too, is affected by magnetic fields. With L30 out of the circuit, the VCO inductance can still be adjusted, if necessary, by slightly squeezing or spreading the turns of T5. The kit is priced at $10. For more information, see our parts order page: http://www.elecraft.com/order_form_parts.htm#K2%20Parts 73, Wayne, N6KR _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com