Strange indeed, and here is why, when I was messing with it just now measuring again, I laid my arm across the case and then I got voltage. Somewhere I had something shorting against the case.
I'm back on track now, VCO voltage is in spec for every band. CAL PLL is running now. When it's done I will double check the bottom of the RF board to make sure I don't have something sticking up too high. Thanks again! harry On Saturday, October 26, 2013, Don Wilhelm wrote: > Harry, > > That is quite strange. I would examine your work carefully, particularly > looking for lifted solder pads and/or solder bridges. > > 80 meters should have only C72 in the circuit. You should trace the VFO > range select path with an ohmmeter by following the path in the schematic > (checking for continuity) from K15 pin 3 through relays K15, K14, and K13 > to C72. Relays K15 and K14 should follow the path shown by the closed > contacts on the schematic while relay K13 should be "set" which means > continuity between pins 3 and 4. > > 73, > Don W3FPR > > On 10/26/2013 9:09 PM, Harry Stone wrote: > >> Well I spoke too soon. I replaced that capacitor and now I have 0 volts >> on >> every band. Any thoughts? >> >> thanx, >> harry >> >> >> >> >> On Saturday, October 26, 2013, Harry Stone wrote: >> >> Don, >>> I know this isn't exactly your first rodeo, but that's still pretty >>> impressive. I have the wrong component installed at C73, I have a 4 >>> <point> 7 pF instead of a 47 pF. >>> >>> Bravo! >>> >>> thanx, >>> harry >>> >>> >>> >>> On Saturday, October 26, 2013, Don Wilhelm wrote: >>> >>> Harry, >>>> >>>> The thing in the VFO Range Select area that is common between 40, 30 and >>>> 15 meters is C73, >>>> Check its value - it should be 47 pF (marked 470). >>>> >>>> A low voltage at R30 indicates that there is not sufficient capacity in >>>> the tuned circuit and the PLL/VCO is trying to increase the value of the >>>> total capacity. That means if C73 is the correct value, check its >>>> soldering and the soldering of relay K13 pin 8. >>>> >>>> CAL PLL depends on having the 40 meter frequency range correct, so you >>>> will not be able to do that procedure until you have the R30 voltage in >>>> range on 40 meters (info 232 means the frequency read by the MCU is not >>>> correct (yes there are other possible causes of info 232). The >>>> alignment >>>> steps are sequential, so if one does not give correct results, you >>>> cannot >>>> skip to the next one without encountering problems. >>>> >>>> 73, >>>> Don W3FPR >>>> >>>> >>>> On 10/26/2013 6:13 PM, Harry Stone wrote: >>>> >>>> My VCO control voltage is zero on 40,30, and 15 meters. All other >>>>> bands >>>>> are within the normal range, all tests prior to these measurements >>>>> passed. >>>>> When I try to run CAL PLL, I get info 232 even though I am on 40 >>>>> meters. >>>>> >>>>> What should I check first? >>>>> >>>>> >>>>> >>>>> -- >>> Have old memories and young hopes. >>> >>> >> > -- Have old memories and young hopes. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
