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 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
[Drakelist] R4C
Can a AM filer be placed in a CW filter slot on an R4C and still function correctly? Thanks Tim ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] sercice cd
I remember a few years ago,I bought a set of service cd's on my drake B-line. Does anyone know the source of the cd's. Would like to order a set for my b-line. thanks dale wt4t ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] sercice cd
Hi Dale, I remember a few years ago,I bought a set of service cd's on my drake B-line. Does anyone know the source of the cd's. Would like to order a set for my b-line. thanks dale wt4t They should be the great Garey K4OAH Drake Service CDs Here you have comments about them: http://www.eham.net/reviews/detail/8008 and here the source: http://www.k4oah.com/ I have some of them and are just GREAT Regards, JOSE - 73 EB5AGV - JOSE V. GAVILA IM99sm La Canyada - Valencia (SPAIN) Vintage Radio and Test Equipment http://jvgavila.com RadioRepair BLOG http://radiorepair.blogspot.com/ European Boatanchors List http://groups.yahoo.com/group/euro_ba_swap Amateur Repairs List http://groups.yahoo.com/group/amateur-repairs ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] R4C
Question to the group. I have two AM filters for the R4C. One a 4kc is in the normal AM slot. Can I add another AM filter, 6KC by placing it in a CW slot and will it work correctly? thanks tim ___ 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 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 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 To: drakelist 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 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] Seeking 2AC Calibrator Crystal ( Again )
Welll, the 100kHz crystal purchased for 2AC was DOA. I used a NE 13E crystal from one of my R-4s, the 2AC works FB. So, I am again on quest for a known good NE 13E or equivalent. If I buy a crystal from JAN or International, does anyone know a part number for the correct 100kHz crystal? 73, Curt ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] FS Drake R7
I'm selling my Drake R7 - it includes the NB7 and 6Khz filter. If interested, contact me off list at: w8...@comcast.net___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] your opinion, please.
I have a complete Drake 7 line station that I want to sell. TR7/PS, L7/p7 ps, ms 7 speaker, 7077 mic, RV7 vfo, P 75 phone patch, Sp 75 speech processor,MN 2700 matching network. All in top condition, and recently completly checked out by a professional shop. My question is this...is it likely that I can locate a buyer to take the station? Or must I break it up..not my desire at all. I would like to see around $2500.00. Appreciate your comments, Gary.___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] your opinion, please.
Looks like a fair price to me for the entire package. 73, John, W4AWM ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Just thinking out loud
Guys and gals... This is somewhat a pipe dream. Just thinking. Would a new state-of-the art power supply for the Trxxx series be doable? Talking about new transformers, improved design, fan cooling, maybe a automatic lost of bias shut down. perhaps more. Same size as the ac4? perhaps smaller? what would be a doable price? Not looking at specifics, but think the $250 to $300 range. Perhaps less, perhaps more. the determining factor will be a good long lasting transformer with improved rating. so.. input anyone? Mike, WB8VGE SunLight Energy Systems The Heathkit Shop http://www.theheathkitshop.com/ J e e p o|||o Note: No trees were killed in the sending of this message, but a large number of electrons were terribly inconvenienced ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Just thinking out loud
Hi Mike, I am not sure how much demand there would be for such a supply. AC-4s are still fairly plentiful at usually $100 or less here in New England. With your AC-4R upgrade kit, it make it into a very nice and reliable power supply with many more years of service in it. Just my 2 cents worth. Tom, W1CC On 10/3/09 2:09 PM, "Mike Bryce" wrote: > Guys and gals... > > This is somewhat a pipe dream. > > Just thinking. Would a new state-of-the art power supply for the Trxxx series > be doable? > > Talking about new transformers, improved design, fan cooling, maybe a > automatic lost of bias shut down. > > perhaps more. Same size as the ac4? perhaps smaller? > > what would be a doable price? > > Not looking at specifics, but think the $250 to $300 range. Perhaps less, > perhaps more. the determining factor will be a good long lasting transformer > with improved rating. > > so.. input anyone? > > > > Mike, WB8VGE > > SunLight Energy Systems > > The Heathkit Shop > > http://www.theheathkitshop.com/ > > J e e p > > o|||o > > Note: No trees were killed in the sending of this message, but a large number > of electrons were terribly inconvenienced > > > > > > > > ___ > Drakelist mailing list > Drakelist@zerobeat.net > http://mailman.zerobeat.net/mailman/listinfo/drakelist Tom Delano tom_del...@comcast.net ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Just thinking out loud
Mike, I am not sure how well that idea would sell because the AC4 power supply is still a very common item to find. I would think the AC4R upgrade kit would be the future for the AC4. I have installed about a dozen of those upgrade kits this year in customer radios and I think this is a definite plus.This kit replaces all the components with new components which by design are much better components than those manufactured 20-30 years ago. I suspect with the upgrade kit, the AC4 power supply will last another 30 years. My two-cents worth. Ron / WB4HFN _ From: drakelist-boun...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net] On Behalf Of Mike Bryce Sent: Saturday, October 03, 2009 2:09 PM To: drakelist@zerobeat.net Subject: [Drakelist] Just thinking out loud Guys and gals... This is somewhat a pipe dream. Just thinking. Would a new state-of-the art power supply for the Trxxx series be doable? Talking about new transformers, improved design, fan cooling, maybe a automatic lost of bias shut down. perhaps more. Same size as the ac4? perhaps smaller? what would be a doable price? Not looking at specifics, but think the $250 to $300 range. Perhaps less, perhaps more. the determining factor will be a good long lasting transformer with improved rating. so.. input anyone? Mike, WB8VGE SunLight Energy Systems The Heathkit Shop http://www.theheathkitshop.com/ J e e p o|||o Note: No trees were killed in the sending of this message, but a large number of electrons were terribly inconvenienced ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Just thinking out loud
Mike - You have some really good ideas to improve the AC-4, especially the Bias failure shut down. I'm not sure what "design improvements" you would make, the design seems pretty stable as it is. As AC-4s are selling for around $100, with your kit added you have a pretty good supply for considerably less than your price range. I don't think I've ever seen a power transformer fail in an AC-4 absent "outside failures". Even a lost Bias meltdown doesn't seem to harm the transformer. I'm also not sure that fan cooling is warranted. Although ANY reduction in temperature of electronic devices is always good, I'm not certain that the AC-4 gets hot enough to matter. I ran three B-Lines in the 60's on autostart RTTY, running 24/7 and with key down, full power transmissions lasting well over 30 minutes. The only failure in 4 years was a single 12BY7 which had a filament open. The finals lasted about a year, and at $12 for a matched pair I replaced them when the output dropped to 100W on 20M AFSK. It's too bad you didn't include a Bias shutdown feature in the AC-4R! I would have suggested if I had known what you were up to. 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs Mike Bryce wrote: Guys and gals... This is somewhat a pipe dream. Just thinking. Would a new state-of-the art power supply for the Trxxx series be doable? Talking about new transformers, improved design, fan cooling, maybe a automatic lost of bias shut down. perhaps more. Same size as the ac4? perhaps smaller? what would be a doable price? Not looking at specifics, but think the $250 to $300 range. Perhaps less, perhaps more. the determining factor will be a good long lasting transformer with improved rating. so.. input anyone? Mike, WB8VGE SunLight Energy Systems The Heathkit Shop http://www.theheathkitshop.com/ J e e p o|||o Note: No trees were killed in the sending of this message, but a large number of electrons were terribly inconvenienced ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] opps.
I've had several reply's and thank everyone...I negelected to include a WH 7 drake wattmeter in the original list of equipment.Gary.___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] more on the TR 7 station.
I should have mentioned the full set of original manuals, notes from the shop where checkout was done, and almost all of the original drake shipping boxes, Gary.___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] dial change on a R4B
I found a beautiful R4b ,bought the rig and found the dial is cracked and some of the dial markings long gone. I have a NOS dial that came with the radio. I have read everything I could fine ,mostly on pto rebuilding where they covered removing the pto and thus the dial also. I did this last year on a Kenwood 830,went pretty well. The assembly? dial and pto on the Drake looks 100% more complicated? than the 830. The pictures and the write ups I read ,shows me the writer had a lot of experience and had done it lots of times. I guess my question is this a job that is easier than it looks?or should be left to someone who does this all the time.I have no problem trouble shooting or aligning the drakes but this looks to me like trying to rebuild a automatic transmission, with pliers even if you a good mechanic. Sure would like to hear from some of you that did the dial replacement thing. thanks for any guidance on this. I don't want to mess up a otherwise fine rig. thanks dale wt4t ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Just thinking out loud
thanks guys for the input... like I was saying, this is just wishful thinking. as for the lost of bias voltage. that's bit rougher. A common problem is just having the plug come somewhat loose and you loose the bias. That would require some feedback or sense wire from the rig back to the power supply. Not a doable option lost of bias at the supply is easier to do. But will require a bit of work. I don't know if the amount of hassle is worth the price of admission. 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] dial change on a R4B
Dale - The B-Line dial is not particularly hard to replace. One REQUIREMENT is a pair of snap-ring pliers. These come in a set from just about any hardware or automotive shop, and are not real expensive. Essentially plier handles with changeable tips, usually two or three different sizes and both straight and offset varieties. The handles are also settable to either "close" the pins or "open" the pins when the handles are squeezed by moving a pivot pin. Once you have these, the job is simple. First set the PTO dial to the low end of the band. Removing the PTO is easy, just three wires and three nuts (6-32) on the spade bolts on the bottom of the PTO. You may need to push the wiring harness around a little to get to them, but not difficult. Digital photos are always a good idea if available. Sure a lot better than a "rough" sketch like we used to make. Once the PTO is out, just remove the front snap-ring and then remove each of the washers, spacers and friction disk on the front side of the dial disk. Do NOT spread the snap-ring any more than necessary to allow it to slide along the shaft. They WILL break if you get too enthusiastic with the snap-ring pliers!! Lay them out on the bench in order so you get them back correctly. I mark the shaft in front of the snap-ring with a marker to get it back at the same spot. If it's too close to the PTO, the main tuning knob skirt might hit the panel when you compress the rubber "clutch" that allows you to hold the skirt while turning the knob to adjust the 0.00 kHz mark on the skirt. Replace the dial disk with the new one, and reassemble, making sure the dial numerals are correct from the front! Don't worry about the actual orientation of the dial disk as it is not difficult to adjust it when the PTO is back in the radio. If you have a counter you can set the PTO to 5.455 MHz (green wire out of the PTO), this is 0.00 on the dial. If you don't have a counter, just SPOT the transmitter or transceiver to get it on frequency. IF the dial is then way off of 0.00, and you look down from the top of the PTO you'll see that the left-most gear is drawn to the right by a coil spring. The hole for this shaft in the front wall of the PTO gearbox is oblong, and if you press the shaft to the left the gear will disengage and the dial will spin freely, allowing you to set it to 0.00, or pretty close. Once it's close, you can center the sliding fiducial on the front panel to the center of the window, and then set the dial exactly by holding the dial disk with one hand while turning the main tuning knob with the other until the calibrate signal is zero-beat. This is the reason for the friction disks / clutch. I think that's all, although I don't have a real good record for accuracy today! It's really easier done than said, especially once you do it a time or three! :-) 73, Garey - K4OAH Glen Allen, VA Drake 2-B, 4-B, C-Line & TR-4/C Service Supplement CDs y...@aol.com wrote: I found a beautiful R4b ,bought the rig and found the dial is cracked and some of the dial markings long gone. I have a NOS dial that came with the radio. I have read everything I could fine ,mostly on pto rebuilding where they covered removing the pto and thus the dial also. I did this last year on a Kenwood 830,went pretty well. The assembly dial and pto on the Drake looks 100% more complicated than the 830. The pictures and the write ups I read ,shows me the writer had a lot of experience and had done it lots of times. I guess my question is this a job that is easier than it looks or should be left to someone who does this all the time.I have no problem trouble shooting or aligning the drakes but this looks to me like trying to rebuild a automatic transmission, with pliers even if you a good mechanic. Sure would like to hear from some of you that did the dial replacement thing. thanks for any guidance on this. I don't want to mess up a otherwise fine rig. thanks dale wt4t ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] looking for B or C line
Thought I had a nice one,b line, turned out not so nice. Iam looking for a B-line or C line. I want to work a trade involving a 9 month old ICOM 746 PRO,with the matching PS-125 power supply and matching SP-23 filtered speaker,all 9.5/10 no issues of any kind. all original boxs.Would like to find the drake line in really nice shape,decent copper in a B and chassis clean in a C. Please no more bench jobs. Let me know what you have ,we can work out the details. ?? Please contact me off line at? y...@aol.com thanks dale wt4t ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
