That was what I was thinking. Knowing what I know about manufacturing, I couldn't see a group of people hand-selecting slug segments to make them all as identical as possible - which is probably why each PTO has those SAT components.
I can remember doing some production testing long ago, where you had to install components (usually resistors) to get the device bang-on. Given that we hams nowadays have many more ways of determining our frequency, I don't consider it a tragedy if the PTO is out a kc or two. 73, Steve, W1ES/4 -----Original Message----- >From: Curt Nixon <[email protected]> >Sent: Nov 4, 2011 7:05 AM >To: Steve Wedge <[email protected]> >Cc: [email protected], Paul Gerhardt <[email protected]>, >[email protected] >Subject: Re: [Drakelist] Drake PTO Repair Question > >I know from trying it that one will play in the other, but...here it >comes, drumroll.....the linearity will not be right. I isn't bad enough >to call it a junker, but may not be in spec from end to end. Not sure >if there are "light" perm cores intermixed or what, but something is >different from rod assy to rod assy. I never dissected the problem any >further than trying it. > >Curt > >Steve Wedge wrote: >> So, is there any interchangeability with these rods, or does losing >> this part of the PTO render all of it a junker? >> >> I remember Garey mentioning that the whole assembly is rather >> precisely-matched. I'm sure there's some variability in the ferrite >> and in all those mechanical connections. >> >> I was so glad when we found out the problem in my problem PTO was a >> capacitor, because I was afraid the problem was going to be in the rod. >> >> Steve Wedge, W1ES/4 >> >> "I can't complain, but sometimes I still do." >> - Joe Walsh >> >> If the above message appears, it came from Steve's Son of Laptop! >> ----- Original Message ----- From: "Curt Nixon" <[email protected]> >> To: <[email protected]> >> Cc: "Paul Gerhardt" <[email protected]>; <[email protected]> >> Sent: Thursday, November 03, 2011 8:39 PM >> Subject: Re: [Drakelist] Drake PTO Repair Question >> >> >>> I think he was asking about the fork to slug rod connection. It is >>> definitely soldered on the ones I have here. Glue or JB weld epoxy >>> is not a good choice since the slug rod is grounded through the fork >>> to the guide rod. A loose slug rod connection will definitely be a >>> jumping issue. >>> Re-soldering seems the only proper solution. >>> >>> The theads are just for the screw to fork.. The slug Rod to fork, in >>> the middle, is soldered. Should be no threads there. But it will >>> require the slug rod be removed from the assembly which means a >>> complete field strip of the entire assembly. I would not try to >>> solder it while in situ. >>> >>> Curt >>> >>> Garey Barrell wrote: >>>> The fork _IS_ threaded! >>>> >>>> Perhaps I misunderstood your problem. The fork is NOT fixed to the >>>> tuning shaft. The shaft rotates and the fork is driven back and >>>> forth by the threads?????? >>>> >>>> IF the fork is solidly affixed to the shaft, the shaft can't turn!! >>>> >>>> -- >>>> 73, Garey - K4OAH >>>> St Charles, IL >>>> >>>> Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line >>>> and TR-4/C Service Supplement CDs >>>> <www.k4oah.com> >>>> >>>> >>>> Paul Gerhardt wrote: >>>>> http://www.wb4hfn.com/DRAKE/DrakeArticles/TechTips/PTO-Repair.htm >>>>> >>>>> The above link answered most of my questions. >>>>> >>>>> The end of the rod is threaded with solder on it and the fork is not >>>>> threaded so my last remaining question is; how was the tuning rod >>>>> affixed to the 'fork'. Would it be better to; >>>>> 1. Use glue like JB Weld or Super Glue >>>>> 2. put more solder on the threads of the rod and press fit >>>>> it back on with a hammer >>>>> 3. put more solder on the threads AND the fork soldering >>>>> them together. >>>>> >>>>> Opt 1 would be the easest and safest method it seems...?? >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> >>>> >>>> _______________________________________________ >>>> Drakelist mailing list >>>> [email protected] >>>> http://mailman.zerobeat.net/mailman/listinfo/drakelist >>>> >>> >>> _______________________________________________ >>> Drakelist mailing list >>> [email protected] >>> http://mailman.zerobeat.net/mailman/listinfo/drakelist >> >> _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
