Garey, the tubes are a "matched" pair of tubes, but one is Sylvania and one is GE, IIRC. Neutralization has been done. I am actually relaying this info from my tech. I am going to send him your response, and the link to http://www.zerobeat.net/drakelist/drakemod/drmod33.html and see if that might help. Not sure about the RF TUNE peaking in the right place... I'll ask him!
Thanks to all who responded off list as well, I have forwarded your emails to Jeff (tech). 73, Brett --- On Sun, 2/14/10, drakelist-requ...@zerobeat.net <drakelist-requ...@zerobeat.net> wrote: > From: drakelist-requ...@zerobeat.net <drakelist-requ...@zerobeat.net> > Subject: Drakelist Digest, Vol 20, Issue 19 > To: drakelist@zerobeat.net > Date: Sunday, February 14, 2010, 11:00 AM > 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. T-4XC issues (Brett Forehand) > 2. Re: T-4XC issues (Garey Barrell) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Sat, 13 Feb 2010 18:55:38 -0800 (PST) > From: Brett Forehand <brett_foreh...@yahoo.com> > Subject: [Drakelist] T-4XC issues > To: drakelist@zerobeat.net > Message-ID: <752047.86310...@web57008.mail.re3.yahoo.com> > Content-Type: text/plain; charset=us-ascii > > Hey everyone, still trying to sort out the "new to me" > Drake twins. Replaced caps in RX/TX, installed new > finals in TX. PS rebuilt using Heathkit Shop's > kit. Final tubes test 100% ouput. Having trouble > loading up transmit. On 80 meters, only getting about > 20 watts out. 10 meters, the output goes up to about > 150 watts out, and is in oscillation. Output goes up from > the low bands to the oscillation/high output state on the > high bands. Power will hold at normal on 20 meters, > but then "bam"! goes into oscillation. Testing > is being done into a dummy load. Can someone point me > in the right direction as to what is wrong? > > Tnx and 73, > Brett > > > > > > > > ------------------------------ > > Message: 2 > Date: Sat, 13 Feb 2010 23:19:12 -0500 > From: Garey Barrell <k4...@mindspring.com> > Subject: Re: [Drakelist] T-4XC issues > To: Drakelist <drakelist@zerobeat.net> > Message-ID: <4b7779c0.4080...@mindspring.com> > Content-Type: text/plain; charset=ISO-8859-1; > format=flowed > > Brett - > > Are the Final tubes the same brand? > > What brand are they? > > Have you done the Final neutralization? Section 5-10 > in the manual. > > Does the RF TUNE peak in the right areas of the scale? > > 73, Garey - K4OAH > Glen Allen, VA > > Drake 2-B, 4-B, C-Line& TR-4/C Service Supplement > CDs > <www.k4oah.com> > > > Brett Forehand wrote: > > Hey everyone, still trying to sort out the "new to me" > Drake twins. Replaced caps in RX/TX, installed new > finals in TX. PS rebuilt using Heathkit Shop's > kit. Final tubes test 100% ouput. Having trouble > loading up transmit. On 80 meters, only getting about > 20 watts out. 10 meters, the output goes up to about > 150 watts out, and is in oscillation. Output goes up from > the low bands to the oscillation/high output state on the > high bands. Power will hold at normal on 20 meters, > but then "bam"! goes into oscillation. Testing > is being done into a dummy load. Can someone point me > in the right direction as to what is wrong? > > > > Tnx and 73, > > Brett > > > > > > > > ------------------------------ > > _______________________________________________ > Drakelist mailing list > Drakelist@zerobeat.net > http://mailman.zerobeat.net/mailman/listinfo/drakelist > > > End of Drakelist Digest, Vol 20, Issue 19 > ***************************************** > _______________________________________________ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
