Garey and *all* that have provided guidance in my pursuit of the T-4XC problems. Thanks very much for your input and time.
I DO have side tone on CW and I hear the expected signal in the receiver when I key the transmitter in spot mode. -Joe in St. Louis WS8X On Thu, Nov 11, 2010 at 11:00 AM, <drakelist-requ...@zerobeat.net> wrote: > Send Drakelist mailing list submissions to > drakelist@zerobeat.net > > To subscribe or unsubscribe via the World Wide Web, visit > http://mailman.zerobeat.net/mailman/listinfo/drakelist > or, via email, send a message with subject or body 'help' to > drakelist-requ...@zerobeat.net > > You can reach the person managing the list at > drakelist-ow...@zerobeat.net > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of Drakelist digest..." > > > Today's Topics: > > 1. Re: "To Boldly Go..." (LONG!) (Garey Barrell) > 2. Re: R4A preselector slippage (Joe Loverti) > 3. Re: T-4XC sudden loss of RF output (joe loverti) > 4. Re: T-4XC sudden loss of RF output (Garey Barrell) > 5. T-4X tune switch (Howard Traxler) > 6. Re: "To Boldly Go..." (LONG!) (Jim Shorney) > 7. Drake 26.1 MHz crystal for R-4C (Donley) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Wed, 10 Nov 2010 13:15:06 -0500 > From: Garey Barrell <k4...@mindspring.com> > To: drakelist@zerobeat.net > Subject: Re: [Drakelist] "To Boldly Go..." (LONG!) > Message-ID: <4cdae12a.6070...@mindspring.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Eddy - > > Very nice! Glad it went well, and we can all learn. I have seen > problems with the 'Dur-Mica' (brown epoxy 'dog-bone') caps. The > slivering 'migrates' onto the ends of the mica sheets and can form > shorts. This usually show up in caps with higher DC voltages on them, > I've never seen it in a PTO. Certainly seems that in your case you just > had some crumbly solder. Only took 50 years for it to show up!! :-) > > Thanks for reporting back and added to the knowledge base! > > 73, Garey - K4OAH > Glen Allen, VA > > Drake 2-B, 2-C/2-NT, 4-B, C-Line& > TR-4/C Service Supplement CDs > <www.k4oah.com> > > > Edward Swynar wrote: > > different wires& parts of the PTO---but when I applied even the gentlest > of > > pressure on one side only of C89---a 3000-pfd. maroon-coloured silver > mica > > cap in the oscillator tank---the exact same warbble& instability of > before > > started anew! I then pressed the other side of this same capacitor, and > the > > signal stabilized. > > > > Hmmmm...sounded like a bad / "aged" solder joint of sorts to me, so I > > applied heat to both points on the board contacting the capacitor's > leads, > > causing the solder therein to re-flow. I then attempted to again induce > the > > instability of before, but could only make the PTO frequency change > slightly > > in frequency, much as was done before by applying pressure to the other > > side... > > > > > > > > ------------------------------ > > Message: 2 > Date: Wed, 10 Nov 2010 13:50:29 -0500 > From: Joe Loverti <ww8x....@gmail.com> > To: drakelist@zerobeat.net > Subject: Re: [Drakelist] R4A preselector slippage > Message-ID: > <aanlktikjze3qgbrsba0a70mhjh7sxxujbm8hpdnjx...@mail.gmail.com> > Content-Type: text/plain; charset="iso-8859-1" > > Interesting comments and I have no doubt you guys have nailed the > problem... > simply, old age!! > > The good news is: I can get the preselector pointer to move into the 15 and > 10 meter sections if I pull the knob very hard towards me as I turn it to > the right -- not an ideal solution -- but, it does work. > > Thanks for your input! > > 73, > Joe > WW8X > Miamisburg, Ohio > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://mailman.zerobeat.net/pipermail/drakelist/attachments/20101110/6ff31ea3/attachment-0001.html > > > > ------------------------------ > > Message: 3 > Date: Wed, 10 Nov 2010 13:11:26 -0600 > From: joe loverti <joelove...@gmail.com> > To: drakelist@zerobeat.net > Subject: Re: [Drakelist] T-4XC sudden loss of RF output > Message-ID: > > <aanlktimvbcbsesgws+y6z2kagx04wre4x8r4ghh4r...@mail.gmail.com<aanlktimvbcbsesgws%2by6z2kagx04wre4x8r4ghh4r%2...@mail.gmail.com> > > > Content-Type: text/plain; charset="iso-8859-1" > > Thanks to all that have replied in with regard to my T-4XC. All connections > have been checked and double checked with no joy. > > Garey... > > A little more background and specifics... All was working perfectly fine > until I had the bright idea to employ the use of an "el cheapo" antenna A/B > switch to change from my Drakes to my modern rig. I went to tune up w/ the > antenna switch in-line and this is when I noticed that my plate current was > WAY lower than it normally is. Normally, a the beginning of the tune up > sequence (with the XTR gain at 9 o'clock) I get a reading of .2 amperes of > plate. After the tune up is complete I usually see the plate at .3 or a > little more. Now the most I can muster is .2 amperes. The RF tune has > little > or no effect. Max out is a little over 10 watts. I was getting over 100 > watts easily on all bands before. Could my finals have failed? I am no > technician but, it seems like this would have happened more gradually. > > I am getting plate current, just way down from where it was at. > > RF tune does peak but, it's way down from where it was. Only about .2 > amperes. > > I've gotten the same results on all the bands that I've tried, 80, 40, and > 20. > > Thanks for the help! > > -Joe Loverti Jr (WS8X) > > St. Louis, MO, not Miamisburg, OH > A lot of folks get my Dad (WW8X) and I confused ;D > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://mailman.zerobeat.net/pipermail/drakelist/attachments/20101110/3b40f7bd/attachment-0001.html > > > > ------------------------------ > > Message: 4 > Date: Wed, 10 Nov 2010 14:18:47 -0500 > From: Garey Barrell <k4...@mindspring.com> > To: drakelist@zerobeat.net > Subject: Re: [Drakelist] T-4XC sudden loss of RF output > Message-ID: <4cdaf017.2060...@mindspring.com> > Content-Type: text/plain; charset=ISO-8859-1; format=flowed > > Joe - > > Perhaps this is too simplistic, but have you removed the switch and gone > straight to the dummy load? > > If you increase the RF GAIN does the plate current / output power increase? > > 73, Garey - K4OAH > Glen Allen, VA > > joe loverti wrote: > > Thanks to all that have replied in with regard to my T-4XC. All > > connections have been checked and double checked with no joy. > > > > Garey... > > > > A little more background and specifics... All was working perfectly > > fine until I had the bright idea to employ the use of an "el cheapo" > > antenna A/B switch to change from my Drakes to my modern rig. I went > > to tune up w/ the antenna switch in-line and this is when I noticed > > that my plate current was WAY lower than it normally is. Normally, a > > the beginning of the tune up sequence (with the XTR gain at 9 o'clock) > > I get a reading of .2 amperes of plate. After the tune up is complete > > I usually see the plate at .3 or a little more. Now the most I can > > muster is .2 amperes. The RF tune has little or no effect. Max out is > > a little over 10 watts. I was getting over 100 watts easily on all > > bands before. Could my finals have failed? I am no technician but, it > > seems like this would have happened more gradually. > > > > I am getting plate current, just way down from where it was at. > > > > RF tune does peak but, it's way down from where it was. Only about .2 > > amperes. > > > > I've gotten the same results on all the bands that I've tried, 80, 40, > > and 20. > > > > Thanks for the help! > > > > -Joe Loverti Jr (WS8X) > > > > St. Louis, MO, not Miamisburg, OH > > A lot of folks get my Dad (WW8X) and I confused ;D > > > > > > _______________________________________________ > > Drakelist mailing list > > Drakelist@zerobeat.net > > http://mailman.zerobeat.net/mailman/listinfo/drakelist > > > > > > ------------------------------ > > Message: 5 > Date: Wed, 10 Nov 2010 19:14:41 -0600 > From: "Howard Traxler" <htraxl...@earthlink.net> > To: <drakelist@zerobeat.net> > Subject: [Drakelist] T-4X tune switch > Message-ID: <002901cb813d$d175d660$6400a...@ht> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=response > > Well, I can't seem to get my T-4XC to work so I hooked up the T-4X > temporarily. Now the question: > > When tuning the xmtr, I get no power out; however, as I switch Tune to SSB, > I get about 1/2 seconds of RF output. Key jack is closed and there is no > mic/push to talk plugged in. > > Any ideas, please? > > Howard, WA9RYF > > > > > ------------------------------ > > Message: 6 > Date: Wed, 10 Nov 2010 22:58:13 -0500 > From: "Jim Shorney" <jshor...@inebraska.com> > To: "drakelist@zerobeat.net" <drakelist@zerobeat.net> > Subject: Re: [Drakelist] "To Boldly Go..." (LONG!) > Message-ID: <20101111045809.06b04225...@mail04.inebraska.com> > Content-Type: text/plain; charset="iso-8859-1" > > On Wed, 10 Nov 2010 13:15:06 -0500, Garey Barrell wrote: > > >Certainly seems that in your case you just > >had some crumbly solder. Only took 50 years for it to show up!! :-) > > I found a cracked solder joint in a TR-7 PTO not long ago, using a method > similar to Eddy's. The connection appeared entirely normal, except that the > cut > end of the wire poking through the solder seemed to be bent at an odd > angle. > The symptom was intermittent PTO operation, and the cause finally presented > itself when the solder joint in question was 'stimulated' with a > non-conductive > tool. > > Orange wood sticks work well for such probing, they are soft enough that > you're > not going to hurt anything. > > 73 > > -Jim > > > -- > Ham Radio NU0C > Lincoln, Nebraska, U.S.S.A. > TR7/RV7/R7A/L7, TR6/RV6, T4XC/R4C/L4B, NCL2000, SB104A, R390A, > GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time! > > "Give a man a URL, and he will learn for an hour; teach him to Google, and > he will learn for a lifetime." > > HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ > http://radiojim.exofire.net > http://incolor.inetnebr.com/jshorney > http://www.nebraskaghosts.org > > > > > > ------------------------------ > > Message: 7 > Date: Thu, 11 Nov 2010 11:59:24 -0500 > From: "Donley" <donley...@comcast.net> > To: <Drakelist@zerobeat.net> > Subject: [Drakelist] Drake 26.1 MHz crystal for R-4C > Message-ID: <1bb0f7502b704221ac767a3dbab95...@ownerb77866e08> > Content-Type: text/plain; charset="iso-8859-1" > > Does anyone have a spare 26.1 MHz crystal (for 15.0 to 15.5 MHz R-4C) > available. Please indicate condition and price plus shipping to 47429. > > 73 > Richard > kc9ub > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: < > http://mailman.zerobeat.net/pipermail/drakelist/attachments/20101111/181df983/attachment-0001.html > > > > ------------------------------ > > _______________________________________________ > Drakelist mailing list > Drakelist@zerobeat.net > http://mailman.zerobeat.net/mailman/listinfo/drakelist > > > End of Drakelist Digest, Vol 29, Issue 14 > ***************************************** >
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