Re: [Drakelist] T-4XB Meter
I think Ron and Lee's suggestion is the answer. I tweaked the needle ever so slightly where the needle takes a 90 degree bend. I was able to put it dead nuts on. The needle looks straight as a pin. Now that I think of it I had a catastrophic 6JB6 failure some time ago which most likely caused the needle to slam hard against the stop which may have caused the needle to bend. I'm not sure why I didn't notice the problem then because I had to replace the finals, both screen resistors, and the meter shunt, reset the bias and re-neutralize the finals. It was nice to have Garey's CD, I was able to go right to R36 the 2.7 ohm resistor. THANKS TO ALL WHO RESPONDED, A GREAT GROUP! John Meyer K8IHY Date: Mon, 14 Mar 2011 09:28:50 -0400 From: k4...@mindspring.com To: jome...@msn.com CC: wd8...@yahoo.com Subject: Re: [Drakelist] T-4XB Meter John - Never seen a meter built that way!! :-) The coil at the bottom of the needle is a counter-balance adjusted so the pointer is steady in all orientations of the meter. I'm seeing the flat 'bar' behind the rear disc that looks like it might slide between the two rivets holding it to the back shell. Can that bar be moved up and to the right?? Garey,Not that I can see. It looks like it's unmovable. The coil (assembly?) itself looks like it too is tilted toward the left.? By the way, Drake paid slightly less than a dollar for these meters !!Yes it looks el-cheapo. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line and TR-4/C Service Supplement CDs www.k4oah.com John Meyer wrote: Ron and Garey, I tried taking a couple pictures of the insides of the meter. My picture taking skills are lacking as is my camera. Hopefully you guys will be able to open the attachments and get some kind of idea what it looks like. On the bottom of the needle is a curled up brass stub that appears to be a counter balance. Also there are two small round disc on the main shaft. One rides inside the coil and one outside. These disc look like a PM. There is no spring. I have a hunch that the positions of these PM disc is what determines the resting position. John Meyer K8IHY Date: Sun, 13 Mar 2011 16:25:39 -0700 From: wd8...@yahoo.com To: k4...@mindspring.com; drakelist@zerobeat.net Subject: Re: [Drakelist] T-4XB Meter Garey, It has been over 10 years now, but I really don't remember seeing any springs. I figured that somewhere there was a stationary magnet that held the meter movement. John has his open from the way it sounds. So hopefully he can tell us what is inside. 73, Ron --- On Sun, 3/13/11, Garey Barrell k4...@mindspring.com wrote: From: Garey Barrell k4...@mindspring.com Subject: Re: [Drakelist] T-4XB Meter To: Ron wd8...@yahoo.com Date: Sunday, March 13, 2011, 5:43 PM John - Ron is one up on me, I've never opened a Drake meter and did not realize they were 'moving vane' types rather than moving coil. Generally, moving vane meters are not adjustable for zero unless the suspension can be rotated. There must be some sort of 'return spring' rather than gravity to make the meter come to rest at the zero point. You might be able to spot it by blowing air GENTLY to move the needle up scale and see what brings it back. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line and TR-4/C Service Supplement CDs www.k4oah.com Ron wrote: John, Not sure that degaussing would be what you want. My guess is that the north/south permanent magnet is on that disk. Then the coil causes a magnetic field that moves the disc and the pointer with it. Every analog meter I know has a permanent magnet somewhere and a coil to create a deflection relative to the permanent magnetic field. The Drake meters are backwards. Most meters have a moving coil and stationary magnet. Drake has a moving magnet and stationary coil. I believe that is you degauss the disc, the meter will never work again. Thought anyone else? 73, Ron WD8SBB --- On *Sun, 3/13/11, John Meyer /jome...@msn.com/* wrote: From: John Meyer jome...@msn.com Subject: RE: [Drakelist] T-4XB Meter To: wd8...@yahoo.com, drakelist@zerobeat.net Date: Sunday, March 13, 2011, 1:58 PM Ron, Thanks for your input. I'm a little afraid to try bending the needle. It's going to take a steady hand. I wonder if the problem develops because of some residual or stray magnetism. If that were the case possibly a degaussing device like used to demagnetize tape heads would resolve the problem. I believe I have one of those devices around here some place left over from my days of servicing tape
[Drakelist] some 11.0 Xtal availables // searching for 14.1 - 22.6 - 24.6 - 26.1
I'm searching for a 14.1 - 22.6 - 24.6 - 26.1 crystals for a Drake R-4B. Have some 11.0 spare crystals , they are only 12,00 USD including airmail shipping to USA . Best 73s G.Galassi, Italy ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Strange serial number
Dear Fellow Drake Addicts, I have come across a T-4X, which appears to be one of the latest of its kind. From the lower side, it looks exactly like T-4XB, but the filters are grey T-4X filters. The final cage is also black and the front panel is of regular T-4X, except for the main tuning knob, which is of B-series type. Before looking inside, I thought the knob was upgraded later, but I am not so sure now. The PTO shaft has the lock ring that is required for this type of knobs. So the PTO is of B-series type. One thing that I haven't quite figured out is about its serial number. It's -0274. I think it should be something like 14xxx or 15xxx, but it has this strange number instead. You can see its QC tag here: http://kihwal.fayoly.net/ham/T4Xser.jpg Instead of stamped date of the usual QC tags found on Drake rigs, it's handwritten and missing the year. I am guessing 1967. Does anyone know about this kind of ser# and what it means? Thanks, Kihwal K9SUL ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] some 11.0 Xtal availables // searching for 14.1 - 22.6 - 24.6 - 26.1
I can provide those crtystals. Please contact me off the list. 73, Bry af4k Sent from myTouch 4G - Reply message - From: Galassi w.mati...@email.it To: drakelist@zerobeat.net Subject: [Drakelist] some 11.0 Xtal availables // searching for 14.1 - 22.6 - 24.6 - 26.1 Date: Mon, Mar 14, 2011 11:45 am I'm searching for a 14.1 - 22.6 - 24.6 - 26.1 crystals for a Drake R-4B. Have some 11.0 spare crystals , they are only 12,00 USD including airmail shipping to USA . Best 73s G.Galassi, Italy ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] T-4XB Meter
John - Yeah, that'll do it!! :-) It IS interesting the way that bar in the back is mounted between those two rivets. It's possible it's a bias magnet of some sort, and then they lacquer it in place at manufacture. Important thing is, it's working!!! :-) 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line and TR-4/C Service Supplement CDs www.k4oah.com John Meyer wrote: *I think Ron and Lee's suggestion is the answer. I tweaked the needle ever so slightly where the needle takes a 90 degree bend. I was able to put it dead nuts on. The needle looks straight as a pin. Now that I think of it I had a catastrophic 6JB6 failure some time ago which most likely caused the needle to slam hard against the stop which may have caused the needle to bend. I'm not sure why I didn't notice the problem then because I had to replace the finals, both screen resistors, and the meter shunt, reset the bias and re-neutralize the finals. It was nice to have Garey's CD, I was able to go right to R36 the 2.7 ohm resistor.* ** *THANKS TO ALL WHO RESPONDED, A GREAT GROUP!* ** *John Meyer K8IHY* ** ** Date: Mon, 14 Mar 2011 09:28:50 -0400 From: k4...@mindspring.com To: jome...@msn.com CC: wd8...@yahoo.com Subject: Re: [Drakelist] T-4XB Meter John - Never seen a meter built that way!! :-) The coil at the bottom of the needle is a counter-balance adjusted so the pointer is steady in all orientations of the meter. I'm seeing the flat 'bar' behind the rear disc that looks like it might slide between the two rivets holding it to the back shell. Can that bar be moved up and to the right?? Garey***,Not that I can see. It looks like it's unmovable. * The coil (assembly?) itself looks like it too is tilted toward the left.? By the way, Drake paid slightly less than a dollar for these meters !!*Yes it looks el-cheapo.* 73, Garey - K4OAH Glen Allen, VA ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Strange serial number
Kihwal, I have several of the older Drakes that where upgraded to the B-Line style knob, its not hard to do nor is it rare to see. Drake sold lots of newer knobs to be installed on earlier equipment. The snap rings simply slides over the PTO shaft and can be placed anywhere. I have converted some back to the original fluted knob. 73, Gary http://home.roadrunner.com/~w8pu/ ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Strange serial number
Hi Gary, Yup. It could have been installed by the owner. But being very near the end of the T-4X production run and based on the fact that it was converted from T-4 to T-4X right before the introduction of T-4XB, I wouldn't be surprised even if some of T-4XB parts were used in the factory. It is totally unrelated, but I need to thank you, Gary. I've recently replaced the soup can filter in my TR-3 with a pair of blue Tyco filters of TR-4. Your pictures and documentation helped a lot! Kihwal K9SUL - Original Message From: Gary Poland gpola...@cinci.rr.com To: drakelist@zerobeat.net Sent: Mon, March 14, 2011 4:16:35 PM Subject: Re: [Drakelist] Strange serial number Kihwal, I have several of the older Drakes that where upgraded to the B-Line style knob, its not hard to do nor is it rare to see. Drake sold lots of newer knobs to be installed on earlier equipment. The snap rings simply slides over the PTO shaft and can be placed anywhere. I have converted some back to the original fluted knob. 73, Gary http://home.roadrunner.com/~w8pu/ ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Needed: S-Meter for Drake 2-A
Hello- I am in need of an S-Meter to for a Drake 2-A receiver. Will consider a parts unit to get a meter. Thanks all, Byron WA5THJ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
