Re: [Drakelist] Drake R4B 5595 kHz oscillator/mixer
- Original Message - From: Charles Bostian bost...@vt.edu To: drakelist@zerobeat.net Sent: Friday, November 14, 2014 1:58 PM Subject: [Drakelist] Drake R4B 5595 kHz oscillator/mixer I am trying to bring my old R4B/T4XB combination back to life after about 35 years of non-use. The 5595 kHz oscillator part of the second mixer 12BE6 circuit does not oscillate. I have tried several tubes with no effect. As far as I can determine, the tube is functioning normally and I can make the receiver work (after a fashion) by injecting a 5595 kHz signal from an external source. Before I take out/test/replace the handfull of Rs and Cs and also look for a replacement xtal, I am wondering if anyone on the list has had a similar problem. In particular, can you recommend a source for a replacement xtal? Thanks! Charles W4KEP It may well be the crystal. Replacements can be obtained from International Crystal. I've bought many crystals from them and all were perfect. They know the parameters for Drake crystals. You might want to post also to the other drake list at: http://groups.yahoo.com/group/DrakeRadio/ It seems to me this is a fairly common problem. -- Richard Knoppow Los Angeles WB6KBL dickb...@ix.netcom.com ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake R4B 5595 kHz oscillator/mixer
the oscillator may be working but on another frequency. if you have a receiver that you can listen around the 5595 wrap a few turns around the second mixer, hook it up to the receiver and tune around the frequency. you may have a cap or inductor that has changed value and the oscillator is still working. if the oscillator is working you can add or subtract capacitance or inductance to bring it to the correct frequency. i have done this many times and it works. mickey wa6fiz On Nov 15, 2014, at 8:50 AM, Richard Knoppow 1oldle...@ix.netcom.com wrote: - Original Message - From: Charles Bostian bost...@vt.edu To: drakelist@zerobeat.net Sent: Friday, November 14, 2014 1:58 PM Subject: [Drakelist] Drake R4B 5595 kHz oscillator/mixer I am trying to bring my old R4B/T4XB combination back to life after about 35 years of non-use. The 5595 kHz oscillator part of the second mixer 12BE6 circuit does not oscillate. I have tried several tubes with no effect. As far as I can determine, the tube is functioning normally and I can make the receiver work (after a fashion) by injecting a 5595 kHz signal from an external source. Before I take out/test/replace the handful of Rs and Cs and also look for a replacement xtal, I am wondering if anyone on the list has had a similar problem. In particular, can you recommend a source for a replacement xtal? Thanks! Charles W4KEP It may well be the crystal. Replacements can be obtained from International Crystal. I've bought many crystals from them and all were perfect. They know the parameters for Drake crystals. You might want to post also to the other drake list at: http://groups.yahoo.com/group/DrakeRadio/ It seems to me this is a fairly common problem. -- Richard Knoppow Los Angeles WB6KBL dickb...@ix.netcom.com ___ 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] Drake R4B 5595 kHz oscillator/mixer
My thanks to everyone who has sent me ideas. At one of your suggestions I built a simple circuit to check the xtal performance. It works fine - series resonant at 5563.3 kHz and parallel resonant between 5599.1 and 5599.3 kHz. So the problem must be in the four caps I haven't checked yet. Naturally they are the four hardest parts to get to! Charles W4KEP -- Charles W. Bostian Alumni Distinguished Professor of ECE Emeritus Virginia Tech 1609 Kennedy Avenue Blacksburg, VA 24060-5731 540-552-9327 (H) ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake R4B 5595 kHz oscillator/mixer
It could very well be a bad crystal. If you or a friend have a crystal not too far from that frequency, you can wire it in and just see if the circuit oscillates. Dennis AE6C On Sat, Nov 15, 2014 at 12:09 PM, Morrell Siegel mandbsie...@charter.net wrote: the oscillator may be working but on another frequency. if you have a receiver that you can listen around the 5595 wrap a few turns around the second mixer, hook it up to the receiver and tune around the frequency. you may have a cap or inductor that has changed value and the oscillator is still working. if the oscillator is working you can add or subtract capacitance or inductance to bring it to the correct frequency. i have done this many times and it works. mickey wa6fiz On Nov 15, 2014, at 8:50 AM, Richard Knoppow 1oldle...@ix.netcom.com wrote: - Original Message - From: Charles Bostian bost...@vt.edu To: drakelist@zerobeat.net Sent: Friday, November 14, 2014 1:58 PM Subject: [Drakelist] Drake R4B 5595 kHz oscillator/mixer I am trying to bring my old R4B/T4XB combination back to life after about 35 years of non-use. The 5595 kHz oscillator part of the second mixer 12BE6 circuit does not oscillate. I have tried several tubes with no effect. As far as I can determine, the tube is functioning normally and I can make the receiver work (after a fashion) by injecting a 5595 kHz signal from an external source. Before I take out/test/replace the handful of Rs and Cs and also look for a replacement xtal, I am wondering if anyone on the list has had a similar problem. In particular, can you recommend a source for a replacement xtal? Thanks! Charles W4KEP It may well be the crystal. Replacements can be obtained from International Crystal. I've bought many crystals from them and all were perfect. They know the parameters for Drake crystals. You might want to post also to the other drake list at: http://groups.yahoo.com/group/DrakeRadio/ It seems to me this is a fairly common problem. -- Richard Knoppow Los Angeles WB6KBL dickb...@ix.netcom.com ___ 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 mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Drake R4B 5595 kHz oscillator/mixer
I am trying to bring my old R4B/T4XB combination back to life after about 35 years of non-use. The 5595 kHz oscillator part of the second mixer 12BE6 circuit does not oscillate. I have tried several tubes with no effect. As far as I can determine, the tube is functioning normally and I can make the receiver work (after a fashion) by injecting a 5595 kHz signal from an external source. Before I take out/test/replace the handfull of Rs and Cs and also look for a replacement xtal, I am wondering if anyone on the list has had a similar problem. In particular, can you recommend a source for a replacement xtal? Thanks! Charles W4KEP -- Charles W. Bostian Alumni Distinguished Professor of ECE Emeritus Virginia Tech 1609 Kennedy Avenue Blacksburg, VA 24060-5731 540-552-9327 (H) ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake R4B calibrator
Have you looked at ExpressPCB/ExpressSCH? Great for what you are describing and the software is free. Rick KD6ZR On 1/22/2014 8:42 PM, Doug Smith wrote: Thanks Mike. Good info. I took a look at circad --- whew! Pricey.. I've got a couple of projects that I've been wanting to have a board or two made up but not at that level of professionalism! 73, Doug, W7KF On Jan 20, 2014, at 10:04 PM, Mike Bryce proso...@sssnet.com mailto:proso...@sssnet.com wrote: Gang The purple pcbs are made by a company called osh park. He ( they) have a thing for purple. Even the mailing envelopes are purple. All the prototypes are purple. Go figure. I use circad for the pcb layout software. I am currently teaching myself eagle. That's been slow. Mike wb8vge Sent from my iPad */Knowledge is knowing a tomato is a fruit; Wisdom is not putting it in a fruit salad./**//* ___ 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] Drake R4B calibrator
THe only problem with the captive freeware from the places like Express is that you cannot do anything else with the result. Not even print out the board layouts--only send them in to have them made. There are several free packages...some good, others not so much, that do the same and are under the GNU free software environmnet. I have used freePCB and the free version of viewmate from Pentalogix to generate standard gerber or plotting files for small boards--multi-layer are ok as well. Learning the full automated process from schematic capture thru net list, etc to final art is an interesting passtime. Starting with a fully documented schematic with bill of material makes the capture process work very well--but it is sometimes contrary to the way us older guys develop stuff! Cheers Curt KU8L On 1/23/2014 7:27 AM, Rick Lutzinger wrote: Have you looked at ExpressPCB/ExpressSCH? Great for what you are describing and the software is free. Rick KD6ZR On 1/22/2014 8:42 PM, Doug Smith wrote: Thanks Mike. Good info. I took a look at circad --- whew! Pricey.. I've got a couple of projects that I've been wanting to have a board or two made up but not at that level of professionalism! 73, Doug, W7KF On Jan 20, 2014, at 10:04 PM, Mike Bryce proso...@sssnet.com mailto:proso...@sssnet.com wrote: Gang The purple pcbs are made by a company called osh park. He ( they) have a thing for purple. Even the mailing envelopes are purple. All the prototypes are purple. Go figure. I use circad for the pcb layout software. I am currently teaching myself eagle. That's been slow. Mike wb8vge Sent from my iPad */Knowledge is knowing a tomato is a fruit; Wisdom is not putting it in a fruit salad./**//* ___ 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 mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake R4B calibrator
Eagle PCB Cad will kick some butt, but it’s a steep learning curve Free, for the trial version with no restrictions other than no pcb bigger than 3 x 4 inches I would never use software that locks into one company, ties all your work to them. Mike Bryce WB8VGE proso...@sssnet.com On Jan 23, 2014, at 9:31 AM, cnixon cptc...@flash.net wrote: THe only problem with the captive freeware from the places like Express is that you cannot do anything else with the result. Not even print out the board layouts--only send them in to have them made. There are several free packages...some good, others not so much, that do the same and are under the GNU free software environmnet. I have used freePCB and the free version of viewmate from Pentalogix to generate standard gerber or plotting files for small boards--multi-layer are ok as well. Learning the full automated process from schematic capture thru net list, etc to final art is an interesting passtime. Starting with a fully documented schematic with bill of material makes the capture process work very well--but it is sometimes contrary to the way us older guys develop stuff! Cheers Curt KU8L On 1/23/2014 7:27 AM, Rick Lutzinger wrote: Have you looked at ExpressPCB/ExpressSCH? Great for what you are describing and the software is free. Rick KD6ZR On 1/22/2014 8:42 PM, Doug Smith wrote: Thanks Mike. Good info. I took a look at circad — whew! Pricey.. I’ve got a couple of projects that I’ve been wanting to have a board or two made up but not at that level of professionalism! 73, Doug, W7KF On Jan 20, 2014, at 10:04 PM, Mike Bryce proso...@sssnet.com wrote: Gang The purple pcbs are made by a company called osh park. He ( they) have a thing for purple. Even the mailing envelopes are purple. All the prototypes are purple. Go figure. I use circad for the pcb layout software. I am currently teaching myself eagle. That's been slow. Mike wb8vge Sent from my iPad Knowledge is knowing a tomato is a fruit; Wisdom is not putting it in a fruit salad. ___ 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 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] Drake R4B calibrator
Thanks Mike. Good info. I took a look at circad — whew! Pricey.. I’ve got a couple of projects that I’ve been wanting to have a board or two made up but not at that level of professionalism! 73, Doug, W7KF On Jan 20, 2014, at 10:04 PM, Mike Bryce proso...@sssnet.com wrote: Gang The purple pcbs are made by a company called osh park. He ( they) have a thing for purple. Even the mailing envelopes are purple. All the prototypes are purple. Go figure. I use circad for the pcb layout software. I am currently teaching myself eagle. That's been slow. Mike wb8vge Sent from my iPad Knowledge is knowing a tomato is a fruit; Wisdom is not putting it in a fruit salad. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake R4B calibrator
Thanks, Mike. I'll have to give them a look. Purple is the color of royalty, you know. 73 -Jim NU0C On Tue, 21 Jan 2014 00:04:46 -0500, Mike Bryce wrote: Gang The purple pcbs are made by a company called osh park. He ( they) have a thing for purple. Even the mailing envelopes are purple. All the prototypes are purple. Go figure. I use circad for the pcb layout software. I am currently teaching myself eagle. That's been slow. Mike wb8vge Sent from my iPad Knowledge is knowing a tomato is a fruit; Wisdom is not putting it in a fruit salad. On Jan 20, 2014, at 11:52 PM, Doug Smith d...@w7kf.com wrote: Found myself wondering the same thing. Where do you get your boards made? And, what software do you use to lay them out? I ask because I have two of the AC-4r kits and greatly admired the boards. 73, Doug, W7KF http://www.w7kf.com On Jan 20, 2014, at 9:36 PM, Jim Shorney jshor...@inebraska.com wrote: It's PURPLE! Now I want to go find an R4B just so I can buy one. Where do you get purple boards made, Mike? 73 -Jim NU0C ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist -- I aim to misbehave. - Captain Malcolm Reynolds, Serenity ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Drake R4B calibrator
Boys and girls… I’ve been working on a replacement calibrator for the drake R4b. This calibrator will output 100, 50, and 25 kHz signals. You select the output with a dip jumper. The output also pulses on and off, and again, you can turn that off if you don’t want it. it has the same footprint as the original, and all wiring plugs into it with a MTA.100 header and plug. This project is about done. I’m in the process of having a small run of pcbs made. here is a link to some photos and ‘scope traces of its output http://theheathkitshop.com/downloads/Drake%20R4b%20calibrator/ Mike, wb8vge Mike, WB8VGE SunLight Energy Systems The Heathkit Shop http://www.theheathkitshop.com/ J e e p o|||o A man with one clock knows what time it is. A man with two clocks is never sure. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake R4B calibrator
It's PURPLE! Now I want to go find an R4B just so I can buy one. Where do you get purple boards made, Mike? 73 -Jim NU0C On Mon, 20 Jan 2014 14:16:28 -0500, Mike Bryce wrote: Boys and girls Ive been working on a replacement calibrator for the drake R4b. This calibrator will output 100, 50, and 25 kHz signals. You select the output with a dip jumper. The output also pulses on and off, and again, you can turn that off if you dont want it. it has the same footprint as the original, and all wiring plugs into it with a MTA.100 header and plug. This project is about done. Im in the process of having a small run of pcbs made. here is a link to some photos and scope traces of its output http://theheathkitshop.com/downloads/Drake%20R4b%20calibrator/ Mike, wb8vge -- 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://incolor.inetnebr.com/jshorney http://www.nebraskaghosts.org ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake R4B calibrator
Found myself wondering the same thing. Where do you get your boards made? And, what software do you use to lay them out? I ask because I have two of the AC-4r kits and greatly admired the boards. 73, Doug, W7KF http://www.w7kf.com On Jan 20, 2014, at 9:36 PM, Jim Shorney jshor...@inebraska.com wrote: It's PURPLE! Now I want to go find an R4B just so I can buy one. Where do you get purple boards made, Mike? 73 -Jim NU0C ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake R4B calibrator
Gang The purple pcbs are made by a company called osh park. He ( they) have a thing for purple. Even the mailing envelopes are purple. All the prototypes are purple. Go figure. I use circad for the pcb layout software. I am currently teaching myself eagle. That's been slow. Mike wb8vge Sent from my iPad Knowledge is knowing a tomato is a fruit; Wisdom is not putting it in a fruit salad. On Jan 20, 2014, at 11:52 PM, Doug Smith d...@w7kf.com wrote: Found myself wondering the same thing. Where do you get your boards made? And, what software do you use to lay them out? I ask because I have two of the AC-4r kits and greatly admired the boards. 73, Doug, W7KF http://www.w7kf.com On Jan 20, 2014, at 9:36 PM, Jim Shorney jshor...@inebraska.com wrote: It's PURPLE! Now I want to go find an R4B just so I can buy one. Where do you get purple boards made, Mike? 73 -Jim NU0C ___ 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] Drake R4B calibrator
Gang, We all know that the RTL parts used in the calibrator are no longer being made. So, if your calibrator in your R4B goes kaput, then you're screwed. This year at the dayton hamvention I talked to Ron, WB4HFN, about the problem and he sent me a broken calibrator board. I needed the dimensions. So, after lots of paper and a few broken pencils, a prototype pcb has been made. Actually, three here made. Same foot print as the original. You have your choice of either 100, 50, or 25 kHZ markers. The marker pulses so you can find it on a crowed band so you're adjusting the dial to the marker instead of a SW broadcast. The pcb will have .100 MTA plug assembly that plugs into the board. It supplies the board with the necessary voltages, ground and output. There is no modification required to the radio, the front panel control will work just as before. A 3.2mHZ crystal is oscillated and divided by a 7 bit ripple counter. You can net the crystal freq with a trimmer on the pcb. There is an on-board regulator to keep the oscillator stable and an adjustment to control the speed of the pulses. This is a prototype board. The next run will have some corrections made and I am going to put in a jumper to select either a pulse output or no pulse (steady) output. The board is a hybrid. It has both through hole and surface mount components. The final cost of the pcb has yet to be determined. I don't know if I will offer it as a kit or fully assembled The surface mount parts are not the ones that look like paint dots, but they are small. If anyone is interested in the remaining two prototypes let me know and I'll assemble and test them. Right now, I don't have an R4B to install one, so will be looking for someone that can write up the procedure on how to install the new calibrator. Mike, WB8VGE Mike Bryce, WB8VGE the heathkit shop SunLight energy systems J e e p o|||o ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake R4B
Gary - KE9PQ has feet! Yes, the serial numbers are sequential and there are three versions of the 'B' that set data points. WB4HFN has a 'Serial Number Database' on his site for most Drake gear. 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 GARY ELLIOT wrote: Good Evening to the group. I just picked up a nice R4B receiver and I am missing one of the rear feet. Any suggestions where to obtain one ? Is there a way to tell by the serial number where in the production run the receiver was made ? Thanks. 73 Gary ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Drake R4B
Good Evening to the group. I just picked up a nice R4B receiver and I am missing one of the rear feet. Any suggestions where to obtain one ? Is there a way to tell by the serial number where in the production run the receiver was made ? Thanks. 73 Gary___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake R4B
Hello I have and R4C. If you install an AM filter in one of the CW slots will in function properly? I already have a 4KC filter in the correct AM slot but want to add an additional 6KC filter as well, the only vacant slot is the CW slot. Thanks Tim From: davidr dav...@cinci.rr.com To: drakelist@zerobeat.net Sent: Friday, October 2, 2009 9:49:28 PM Subject: [Drakelist] Drake R4B About a week ago I inquired about a microphone and an AC-4 power source. Thank you all for your responses and I did purchase both of them. In the process I also acquired a T-4B transmitter in very good condition and would like to find a good R-4B to go with it. If anyone has one for sale, I would appreciate a reply. Thank you all once again and 73, David w8...@arrl.net ___ 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] Drake R4B
Tim - I've never tried it, but it should work, sorta :-) The AM filter position has three resistors to match the filter impedance, (apparently different than the CW/SSB filters?,) and most likely to increase the insertion loss so that the output level stays approximately the same when switching between the two types of filters. So just plugging in the filter may work, but the passband may be distorted and the output may increase considerably when switching to AM. It certainly won't hurt anything to try. I would say try just plugging it in, and let us know the results! 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com amfone wrote: Hello I have and R4C. If you install an AM filter in one of the CW slots will in function properly? I already have a 4KC filter in the correct AM slot but want to add an additional 6KC filter as well, the only vacant slot is the CW slot. Thanks Tim ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake R4B
Lee - Yes, it would be using the Product Detector and so you would be using exalted carrier for AM. I made the (rash?!) assumption that you would put the narrower filter in the CW spot to use during difficult conditions where exalted carrier would be an advantage. The Third Mixer LO is also switched for AM to center the passband of the 50 kHz IF... Most likely will not be satisfactory. If you're going to use exalted carrier anyway, you might as well use the SSB filter at 2.1 to get the full advantage. Thanks for pointing out my error(s)!! :-) That's what I get for thinking too early in the morning! 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com kc9...@aol.com wrote: Won't it be using the wrong detector? How about the BFO being on? Of course you could use exaled carrier method of reception73, Lee -Original Message- From: Garey Barrell k4...@mindspring.com To: drakelist drakelist@zerobeat.net Sent: Sat, Oct 3, 2009 10:32 am Subject: Re: [Drakelist] Drake R4B Tim - I've never tried it, but it should work, sorta :-) The AM filter position has three resistors to match the filter impedance, (apparently different than the CW/SSB filters?,) and most likely to increase the insertion loss so that the output level stays approximately the same when switching between the two types of filters. So just plugging in the filter may work, but the passband may be distorted and the output may increase considerably when switching to AM. It certainly won't hurt anything to try. I would say try just plugging it in, and let us know the results! 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com http://www.k4oah.com/ amfone wrote: Hello I have and R4C. If you install an AM filter in one of the CW slots will in function properly? I already have a 4KC filter in the correct AM slot but want to add an additional 6KC filter as well, the only vacant slot is the CW slot. Thanks Tim ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Drake R4B
About a week ago I inquired about a microphone and an AC-4 power source. Thank you all for your responses and I did purchase both of them. In the process I also acquired a T-4B transmitter in very good condition and would like to find a good R-4B to go with it. If anyone has one for sale, I would appreciate a reply. Thank you all once again and 73, David w8...@arrl.net ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake R4B Electrolytic Need (Bill Becky Marvin)
Bill I dont know if he has them but ask at www.*hayseedhamfest*.com From: Bill Becky Marvin wmar...@hickorytech.net Subject: [Drakelist] Drake R4B Electrolytic Need To: drakelist@zerobeat.net Message-ID: 5cf76cbd0ec44103a1858ef84cf93...@yourb27fb1c401 Content-Type: text/plain; charset=iso-8859-1 Hello Group The last remaining problem with my R4B refurb is the 4 Section Electrolytic Cap. Does anyone know a source to rebuild my Electrolytic? I am willing to pay Postage/Parts Labor time. Or purchase one already rebuilt. Very 73 Bill KB9IV -- Paul Gerhardt K3PG http://pgerhardt.blogspot.com QRP ARCI 6674 FP 274 ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Drake R4B Electrolytic Need (Bill Becky Marvin)
Thank you very kindly, Paul! Bill's R-4B can-cap is on the way to him as we speak. Vy 73 es best dx, Tom Paul Gerhardt wrote: Bill I dont know if he has them but ask at www.*hayseedhamfest*.com From: Bill Becky Marvin wmar...@hickorytech.net mailto:wmar...@hickorytech.net Subject: [Drakelist] Drake R4B Electrolytic Need To: drakelist@zerobeat.net mailto:drakelist@zerobeat.net Message-ID: 5cf76cbd0ec44103a1858ef84cf93...@yourb27fb1c401 Content-Type: text/plain; charset=iso-8859-1 Hello Group The last remaining problem with my R4B refurb is the 4 Section Electrolytic Cap. Does anyone know a source to rebuild my Electrolytic? I am willing to pay Postage/Parts Labor time. Or purchase one already rebuilt. Very 73 Bill KB9IV -- Paul Gerhardt K3PG http://pgerhardt.blogspot.com QRP ARCI 6674 FP 274 ___ 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] Drake R4B Electrolytic Need
Bill - Excellent, high quality replacement available from Tom at Hayseed Hamfest t...@hayseedhamfest.com 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line TR-4/C Service Supplement CDs www.k4oah.com Bill Becky Marvin wrote: *Hello Group The last remaining problem with my R4B refurb is the 4 Section Electrolytic Cap. Does anyone* *know a source to rebuild my Electrolytic? I am willing to pay Postage/Parts Labor time. Or purchase one* *already rebuilt.* ** *Very 73* ** *Bill KB9IV* ** ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [drakelist] Drake R4B
Garey Barrell [EMAIL PROTECTED] made an utterence to the drakelist gang -- Steve - Drake never provided a service manual for the 4 Series, other than the SPR-4. The biggest problem is locating parts on the chassis. I have made a parts locator manual for the C Line, maybe do the B Line one day! It's a lot of work, and is not a big seller. A sample is at http://hr99.home.mindspring.com/R-4C_Servicez It makes it a LOT easier. All the information you need to service the receiver is in the Drake manual, except where parts are located. As for your R-4B, we'd need a lot more information to troubleshoot. Is it low on all bands? How low? What is the signal strength of the calibrator? Are all the tubes lit? Especially V1. Obviously the first thing is to see if the S-Meter is at 0 with no signal applied, and goes to 60 dB over S-9 when the RF Gain is turned full CCW. If this is good, then check the bias voltage at TP-2 as described in the manual. This must be very close to -1.35V and sets the sensitivity of the receiver. Next is to try the Antenna, RF and Injection alignment as described in the manual. Do a single band, using the calibrator, to see if any improvement can be made. Do not bother with any of the other alignment, as it it almost certainly OK, unless of course someone has been tightening all the loose screws.! Let us know what you find! 73, Garey - K4OAH Atlanta Steve Schaub wrote: I'm restoring a Drake R4B that has low rx sensitivity. I have the original manual shipped with the receiver, but was wanting to know if there ever was a service manual available for the Drake R4B? If this manual ever existed, anyone know where a person can get a copy? Many thanks for taking the time to read... * ARS: W4PF * Steve Schaub * E-mail: [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] /\/\/\/\/\/\/\/\/\/\/\ END OF TRANSMISSION /\/\/\/\/\/\/\/\/\/\/\/\/\/\/ -- On Behalf of Garey Barrell [EMAIL PROTECTED] Submissions:drakelist@www.zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
[drakelist] Drake R4B White noise but No Signal
Kevin Gray [EMAIL PROTECTED] made an utterence to the drakelist gang -- I have been working on my R4B with excellent help from Mr. Al Parker. He has been a wealth of knowledge and I sincerely thank him. With Al's input I have gone from no audio to obtaining white noise on the receiver. I am not able to tune any stations and I do not see movement in the S meter as I move across the band. With the Pre Selector I am able to increase the noise level. The preselector does not necessarily match up with the band that I am on. For instance 40 meters peak noise is with the red indicator close the 80 meter mark and 80 meters is noisiest with the preselector at the 20 meter area. I was wondering if any one has experienced white noise with no signal before. Thanks Kevin K8SU [EMAIL PROTECTED] -- On Behalf of Kevin Gray [EMAIL PROTECTED] Submissions:drakelist@www.zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
Re: [drakelist] Drake R4B White noise but No Signal
Garey Barrell [EMAIL PROTECTED] made an utterence to the drakelist gang -- Kevin - Sounds like the HF Oscillator might not be running. 73, Garey - K4OAH Atlanta Kevin Gray wrote: Kevin Gray [EMAIL PROTECTED] made an utterence to the drakelist gang -- I have been working on my R4B with excellent help from Mr. Al Parker. He has been a wealth of knowledge and I sincerely thank him. With Al's input I have gone from no audio to obtaining white noise on the receiver. I am not able to tune any stations and I do not see movement in the S meter as I move across the band. With the Pre Selector I am able to increase the noise level. The preselector does not necessarily match up with the band that I am on. For instance 40 meters peak noise is with the red indicator close the 80 meter mark and 80 meters is noisiest with the preselector at the 20 meter area. I was wondering if any one has experienced white noise with no signal before. Thanks Kevin K8SU [EMAIL PROTECTED] -- On Behalf of Garey Barrell [EMAIL PROTECTED] Submissions:drakelist@www.zerobeat.net Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
[drakelist] Drake R4B Bad Caps Question
Kevin Gray [EMAIL PROTECTED] made an utterence to the drakelist gang -- I am working on a R4B and have a noise when I turn on the rig. I am assuming it is the caps in the Can. I looked on the Drake site and saw that W8UT had a good fix. I was wondering if anyone has tried this method of fixing a R4B or if there is anywhere to buy a can already manufactured with these caps. Thanks Kevin K8SU [EMAIL PROTECTED] -- On Behalf of Kevin Gray [EMAIL PROTECTED] Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
Re: [drakelist] Drake R4B Bad Caps Question
Al Parker [EMAIL PROTECTED] made an utterence to the drakelist gang -- Hi Tim, et al, My work is shown at: http://www.thecompendium.net/radio/filtercap.htm and it's also linked to from Thom's Drake site's tech notes pg; http://www.zerobeat.net/drakelist/ It takes about an hour to open the can, clean it out, put in new discretes, and seal it up. Not a dificult job, I explain it more on that page. Also on the same page, I've got info supplied by Mark, K9MRK, on caps of proper size to fit under the chassis of an AC-3/4. There's not a lot of space there, or in the rcvrs, so physical dimensions need to be watched when purchasing caps. 73, Al, W8UT New Bern, NC BoatAnchors appreciated here http://www.thecompendium.net/radio/ http://www.hammarlund.info - Original Message - From: Tim Kass [EMAIL PROTECTED] To: [EMAIL PROTECTED]; [EMAIL PROTECTED] Sent: Sunday, December 12, 2004 6:05 PM Subject: RE: [drakelist] Drake R4B Bad Caps Question Tim Kass [EMAIL PROTECTED] made an utterence to the drakelist gang -- Kevin, I dont remember what W8UT did, probably the same thing that Im telling you, but I saw a neat fix that someone did on one of my R4B's, left the electrolytic can in place so it looked stock, but cut all the leads from it underside and wired in separate small electrolytics...works great. Otherwise, its difficult to find replacements. I have found some at Mendelson's Surplus in Dayton,Ohio, they have alot of NOS but I was alittle concerned about them being dryed up, I bought some and used them in my Hammarlunds, they were fine. I don't know if they will get them for you however, Mendelson's is a huge surplus place, about the physical size of a football field, with rows and rows of NOS as well as used parts in bins. I go up there about twice a year to stock up on parts and hardware, they also sell screws, nuts, bolts, etc. for $100 a pound. 73, Tim K8WBL WD-40, Balin' wire, silicone sealant and duct tape, pretty much fixes everything! From: Kevin Gray [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: [drakelist] Drake R4B Bad Caps Question Date: Sun, 12 Dec 2004 13:49:04 -0500 Kevin Gray [EMAIL PROTECTED] made an utterence to the drakelist gang -- I am working on a R4B and have a noise when I turn on the rig. I am assuming it is the caps in the Can. I looked on the Drake site and saw that W8UT had a good fix. I was wondering if anyone has tried this method of fixing a R4B or if there is anywhere to buy a can already manufactured with these caps. Thanks Kevin K8SU [EMAIL PROTECTED] -- On Behalf of Kevin Gray [EMAIL PROTECTED] Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net Brought to you courtesy of TLCHost.net http://www.tlchost.net/ -- -- On Behalf of Tim Kass [EMAIL PROTECTED] Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net Brought to you courtesy of TLCHost.net http://www.tlchost.net/ -- -- On Behalf of Al Parker [EMAIL PROTECTED] Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
Re: [drakelist] Drake R4B Bad Caps Question
Al Parker [EMAIL PROTECTED] made an utterence to the drakelist gang -- Hi Devin, et al, Yes that method works fine. Space for discrete caps under the chassis is a bit hard to find. If you don't want to undertake it yourself, I could be persuaded to re-stuff your can for a nominal fee, plus parts. I don't know if AES has the proper size in their new mfgd ones, you might check. 73, Al, W8UT New Bern, NC BoatAnchors appreciated here http://www.thecompendium.net/radio/ http://www.hammarlund.info - Original Message - From: Kevin Gray [EMAIL PROTECTED] To: [EMAIL PROTECTED] Sent: Sunday, December 12, 2004 1:49 PM Subject: [drakelist] Drake R4B Bad Caps Question Kevin Gray [EMAIL PROTECTED] made an utterence to the drakelist gang -- I am working on a R4B and have a noise when I turn on the rig. I am assuming it is the caps in the Can. I looked on the Drake site and saw that W8UT had a good fix. I was wondering if anyone has tried this method of fixing a R4B or if there is anywhere to buy a can already manufactured with these caps. Thanks Kevin K8SU [EMAIL PROTECTED] -- On Behalf of Kevin Gray [EMAIL PROTECTED] Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net Brought to you courtesy of TLCHost.net http://www.tlchost.net/ -- -- On Behalf of Al Parker [EMAIL PROTECTED] Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
RE: [drakelist] Drake R4B Bad Caps Question
Tim Kass [EMAIL PROTECTED] made an utterence to the drakelist gang -- Kevin, I dont remember what W8UT did, probably the same thing that Im telling you, but I saw a neat fix that someone did on one of my R4B's, left the electrolytic can in place so it looked stock, but cut all the leads from it underside and wired in separate small electrolytics...works great. Otherwise, its difficult to find replacements. I have found some at Mendelson's Surplus in Dayton,Ohio, they have alot of NOS but I was alittle concerned about them being dryed up, I bought some and used them in my Hammarlunds, they were fine. I don't know if they will get them for you however, Mendelson's is a huge surplus place, about the physical size of a football field, with rows and rows of NOS as well as used parts in bins. I go up there about twice a year to stock up on parts and hardware, they also sell screws, nuts, bolts, etc. for $100 a pound. 73, Tim K8WBL WD-40, Balin' wire, silicone sealant and duct tape, pretty much fixes everything! From: Kevin Gray [EMAIL PROTECTED] To: [EMAIL PROTECTED] Subject: [drakelist] Drake R4B Bad Caps Question Date: Sun, 12 Dec 2004 13:49:04 -0500 Kevin Gray [EMAIL PROTECTED] made an utterence to the drakelist gang -- I am working on a R4B and have a noise when I turn on the rig. I am assuming it is the caps in the Can. I looked on the Drake site and saw that W8UT had a good fix. I was wondering if anyone has tried this method of fixing a R4B or if there is anywhere to buy a can already manufactured with these caps. Thanks Kevin K8SU [EMAIL PROTECTED] -- On Behalf of Kevin Gray [EMAIL PROTECTED] Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net Brought to you courtesy of TLCHost.net http://www.tlchost.net/ -- -- On Behalf of Tim Kass [EMAIL PROTECTED] Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
[drakelist] Drake R4B
Kevin Gray [EMAIL PROTECTED] made an utterence to the drakelist gang -- Nice condition Drake R4B. It is NOT working. Lites up but no audio. Might be a switch that is dirty. $195 15XXX serial number. Pics available. Thanks Kevin K8SU [EMAIL PROTECTED] -- On Behalf of Kevin Gray [EMAIL PROTECTED] Submissions:[EMAIL PROTECTED] Unsubscribe:[EMAIL PROTECTED] - unsubscribe drakelist in body Hopelessly Lost:[EMAIL PROTECTED] - help in body of message Zerobeat Web Page: http://www.zerobeat.net Brought to you courtesy of TLCHost.net http://www.tlchost.net/ --
