Re: [Elecraft] Noisy RF gain pot?
Alan, Don is right. I thought I had done the right thing some years ago, ordering what I thought was the same pot from a UK supplier. I still have it in my drawer of bits somewhere - it didn't fit. I then ordered from Elecraft, not stupidly expensive although the shipping always bites it seems to me, and all was well. (Wish I'd never sold the K2 but I had to at the time to part fund the K3, which I still have :-) 73 Stephen G4SJP On 17 February 2015 at 19:25, Don Wilhelm w3...@embarqmail.com wrote: Alan, With that serial number, there could be a lot of wear on the pot if the prior operator used the RF Gain a lot. It is one of the standard size pot 5K linear, but there are pots with different form factors. I would suggest you get the proper one from Elecraft PN E520004 to be certain it fits. 73, Don W3FPR On 2/17/2015 1:15 PM, Alan Ibbetson wrote: Thanks Don. It's an early K2, serial number 997. Is there anything unusual about the pot or is it just a standard sized miniature 5K linear? 73, Alan G3XAQ On 17/02/2015 18:02, Don Wilhelm wrote: Alan, If the RF gain pot is worn it will behave that way. If this is a fairly new K2 I would say SN above 4000, the pot should not be worn out yet unless the operator used it excessively - so in that case, look for an unsoldered connection between the RF gain control and the path to the K2 Control Board. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to eastbrantw...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
[Elecraft] Noisy RF gain pot?
I have just (again) acquired a K2/100. It shows exactly the symptom below as described in 2009 --- If I move (even very slightly) the rf gain control the audio silences and the S meter shows full deflection. After about three seconds or so the receiver recovers and the s meter returns to normal. This happens wherever teh rf gain control is positioned about it's axis. Any suggestions ? 73 de Vic GW4JUN - It was suggested the RF Gain pot might be noisy but the OP never followed up. Is this most likely root cause? If so, can someone point me towards a replacement 5K LIN pot that will fit, ideally sourced from Newark (Farnell in the UK)? Thanks a lot, Alan G3XAQ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Noisy RF gain pot?
Alan, If the RF gain pot is worn it will behave that way. If this is a fairly new K2 I would say SN above 4000, the pot should not be worn out yet unless the operator used it excessively - so in that case, look for an unsoldered connection between the RF gain control and the path to the K2 Control Board. 73, Don W3FPR On 2/17/2015 12:44 PM, Alan Ibbetson wrote: I have just (again) acquired a K2/100. It shows exactly the symptom below as described in 2009 --- If I move (even very slightly) the rf gain control the audio silences and the S meter shows full deflection. After about three seconds or so the receiver recovers and the s meter returns to normal. This happens wherever teh rf gain control is positioned about it's axis. Any suggestions ? 73 de Vic GW4JUN - It was suggested the RF Gain pot might be noisy but the OP never followed up. Is this most likely root cause? If so, can someone point me towards a replacement 5K LIN pot that will fit, ideally sourced from Newark (Farnell in the UK)? Thanks a lot, Alan G3XAQ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Noisy RF gain pot?
Thanks Don. It's an early K2, serial number 997. Is there anything unusual about the pot or is it just a standard sized miniature 5K linear? 73, Alan G3XAQ On 17/02/2015 18:02, Don Wilhelm wrote: Alan, If the RF gain pot is worn it will behave that way. If this is a fairly new K2 I would say SN above 4000, the pot should not be worn out yet unless the operator used it excessively - so in that case, look for an unsoldered connection between the RF gain control and the path to the K2 Control Board. 73, Don W3FPR On 2/17/2015 12:44 PM, Alan Ibbetson wrote: I have just (again) acquired a K2/100. It shows exactly the symptom below as described in 2009 --- If I move (even very slightly) the rf gain control the audio silences and the S meter shows full deflection. After about three seconds or so the receiver recovers and the s meter returns to normal. This happens wherever teh rf gain control is positioned about it's axis. Any suggestions ? 73 de Vic GW4JUN - It was suggested the RF Gain pot might be noisy but the OP never followed up. Is this most likely root cause? If so, can someone point me towards a replacement 5K LIN pot that will fit, ideally sourced from Newark (Farnell in the UK)? Thanks a lot, Alan G3XAQ -- Alan Ibbetson a...@g3xaq.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Noisy RF gain pot?
Alan, With that serial number, there could be a lot of wear on the pot if the prior operator used the RF Gain a lot. It is one of the standard size pot 5K linear, but there are pots with different form factors. I would suggest you get the proper one from Elecraft PN E520004 to be certain it fits. 73, Don W3FPR On 2/17/2015 1:15 PM, Alan Ibbetson wrote: Thanks Don. It's an early K2, serial number 997. Is there anything unusual about the pot or is it just a standard sized miniature 5K linear? 73, Alan G3XAQ On 17/02/2015 18:02, Don Wilhelm wrote: Alan, If the RF gain pot is worn it will behave that way. If this is a fairly new K2 I would say SN above 4000, the pot should not be worn out yet unless the operator used it excessively - so in that case, look for an unsoldered connection between the RF gain control and the path to the K2 Control Board. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] Noisy RF gain pot?
OK, thanks everyone. I'll order a replacement pot. 73, Alan G3XAQ On 17/02/2015 19:32, Stephen Prior wrote: Alan, Don is right. I thought I had done the right thing some years ago, ordering what I thought was the same pot from a UK supplier. I still have it in my drawer of bits somewhere - it didn't fit. I then ordered from Elecraft, not stupidly expensive although the shipping always bites it seems to me, and all was well. (Wish I'd never sold the K2 but I had to at the time to part fund the K3, which I still have :-) 73 Stephen G4SJP On 17 February 2015 at 19:25, Don Wilhelm w3...@embarqmail.com mailto:w3...@embarqmail.com wrote: Alan, With that serial number, there could be a lot of wear on the pot if the prior operator used the RF Gain a lot. It is one of the standard size pot 5K linear, but there are pots with different form factors. I would suggest you get the proper one from Elecraft PN E520004 to be certain it fits. 73, Don W3FPR On 2/17/2015 1:15 PM, Alan Ibbetson wrote: Thanks Don. It's an early K2, serial number 997. Is there anything unusual about the pot or is it just a standard sized miniature 5K linear? 73, Alan G3XAQ On 17/02/2015 18:02, Don Wilhelm wrote: Alan, If the RF gain pot is worn it will behave that way. If this is a fairly new K2 I would say SN above 4000, the pot should not be worn out yet unless the operator used it excessively - so in that case, look for an unsoldered connection between the RF gain control and the path to the K2 Control Board. __ Elecraft mailing list Home: http://mailman.qth.net/__mailman/listinfo/elecraft http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.__htm http://mailman.qth.net/mmfaq.htm Post: mailto:elecr...@mailman.qth.__net mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to eastbrantw...@gmail.com mailto:eastbrantw...@gmail.com -- Alan Ibbetson a...@g3xaq.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
