[Drakelist] testing, getting blocked messages from Drakelist
testing Getting spam blocker messages from drakel...@erobeat.net. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] TR7-A No power out in cw or phone
resending that message that got blocked. Appears to be intermittent. --- On Sat, 8/6/11, Ron wd8...@yahoo.com wrote: From: Ron wd8...@yahoo.com Subject: Re: [Drakelist] TR7-A No power out in cw or phone To: Drakelist@zerobeat.net Drakelist@zerobeat.net, Jim Shorney jshor...@inebraska.com Date: Saturday, August 6, 2011, 8:07 AM Be careful as you pull the DR7 board. Easy to bump the rig's internal voltage regulator board pots (just to the right and behind the PTO). I also put an index mark on the plugs and board. The R77 board does not seem to have indexed connectors. Or at least I am not seeing them. I found that a old computer chassis card blank (L-shaped piece of metal) works well as a mini pry bar. Don't get aggressive, just a little help. Look around for screws holding things. There are a couple in not so obvious places. 73, Ron WD8SBB --- On Sat, 8/6/11, Jim Shorney jshor...@inebraska.com wrote: From: Jim Shorney jshor...@inebraska.com Subject: Re: [Drakelist] TR7-A No power out in cw or phone To: Drakelist@zerobeat.net Drakelist@zerobeat.net Date: Saturday, August 6, 2011, 1:21 AM First step: unplug each circuit board, clean and DeOxit the pins and sockets, and reseat boards. This clears up an awful lot of 7-line problems. 73 -Jim On Fri, 5 Aug 2011 01:05:04 -0400 (EDT), Randall Murphree wrote: 1. All lights light up on a ham frequency except the mic gain green light. 2. In cw mode it clicks but there is no power out. 3. With mic plugged in no power out. 4. Have check the fuse in the power supply which is a PS7. Thanks, Randall Murphree, W4DEU -- 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 ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] TR7-A No power out in cw or phone
On Sat, 6 Aug 2011 05:07:43 -0700 (PDT), Ron wrote: I found that a old computer chassis card blank (L-shaped piece of metal) works well as a mini pry bar. Don't get aggressive, just a little help. And, for the other boards, instructions to make a copy of the Drake card puller are here: http://members.ziggo.nl/cmulder/drake.htm#bookmark9 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://incolor.inetnebr.com/jshorney http://www.nebraskaghosts.org ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] 4 line crystals
Quick answer: Yes and No. Yes, the same crystals will work in both, but are (or should really be) different. The R-4 BAND oscillator is a tube, and the crystals are probably (or should be) parallel resonant, cut for a 32 pF parallel load. The R-4A BAND oscillator is a bipolar transistor and the crystals are (or should be) series resonant, series resistance less than 30 ohms. ALL T-4X(any) are bipolar transistor, series resonant. Now, that said, either will 'work' in either, but will resonate at a 'few' kHz different frequency, proportional to crystal frequency. I believe some of the band-to-band variations seem in some receivers is the result of swapping crystals from unit to unit. The original specification was +/- 0.003% of marked frequency, (+/- 210 Hz @ 7 MHz,) with modern International Crystal Mfr crystals typically much closer than that. A SET of new crystals from ICM will typically be within a few tens of Hz from band to band. Once again, more than anyone wanted to know, but . I can't help myself! :-) 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 Neil M Califano wrote: Quick question: Do the R4 and the R4A take the same crystals? ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] TR7-A No power out in cw or phone
Jim Shorney wrote: On Sat, 6 Aug 2011 05:07:43 -0700 (PDT), Ron wrote: I found that a old computer chassis card blank (L-shaped piece of metal) works well as a mini pry bar. Don't get aggressive, just a little help. And, for the other boards, instructions to make a copy of the Drake card puller are here: http://members.ziggo.nl/cmulder/drake.htm#bookmark9 Jim - I 'improved' upon that approach by just cutting off one V end of the coat hanger. You put your hand in the V, and lever against your wrist on top of the other cards. MUCH more controlled force, and no YIKES when the pins suddenly let go. 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 ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Tuning
While not as easy to do with DRAKE stuff, I used to run SWAN stuff (still have a 350 500C I listen to), and the best method for preserving those sweep-tube finals was to UNBALANCE the Carrier Balance control, thereby injecting a very small amount of carrier - peak the grid - dip the plates, then REZERO the carrier-balance. Worked swell, and the 500C that I got in 1972 still had the ORIGINAL finals in 1982, when I replaced the rig... and yes - they were still good after many, many hours of use. [ the SWANS required balanced tubes - they REALLY did - and they weren't cheap ] Tom - WØEAJ ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] TR7-A No power out in cw or phone
On Sat, 06 Aug 2011 11:37:03 -0400, Garey Barrell wrote: I 'improved' upon that approach by just cutting off one V end of the coat hanger. You put your hand in the V, and lever against your wrist on top of the other cards. MUCH more controlled force, and no YIKES when the pins suddenly let go. Garey, you just HAVE to be different, don't you? :) I should point out, for those who have not been there, done that yet, the board puller mates up with small holes near the upper edge of the vertcally interted boards. The wide boards will have two holes, narrow boards will have only one. As a side note, some of the boards have copper grounding fingers attached - make sure the mating surfaces are clean and the fingers are springy enough to make contact. I don't recall who first posted the PC slot cover idea for a DR-7 puller, but that was one of those d'oh! moments for me when I first read it. I was a PC tech for over 10 years, and I'm always tripping over those things around here. I just never made the connection. IBM slot covers are much better than any of the others, of course 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://incolor.inetnebr.com/jshorney http://www.nebraskaghosts.org ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] TR7-A No power out in cw or phone
Jim Shorney wrote: On Sat, 06 Aug 2011 11:37:03 -0400, Garey Barrell wrote: I 'improved' upon that approach by just cutting off one V end of the coat hanger. You put your hand in the V, and lever against your wrist on top of the other cards. MUCH more controlled force, and no YIKES when the pins suddenly let go. Garey, you just HAVE to be different, don't you? :) IBM slot covers are much better than any of the others, of course Nope, don't knock it before you try the V. The ends are bent at the tip just like the square one. You can spread it to pick up both holes, just like the square one, or works just as well on the single hole since it's controllable that way too. Better than any PC left-over!! 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 ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] 4 line crystals
On Sat, 06 Aug 2011 11:02:33 -0400, Garey Barrell wrote: Once again, more than anyone wanted to know, but . I can't help myself! :-) Not to worry, we learn stuff. 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://incolor.inetnebr.com/jshorney http://www.nebraskaghosts.org ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] thoughts
thanks to everyone who replied I really wasn't expecting that, I was just expressing my thoughts. It's nice to know others feel the same way but apparently not as apprehensive as me (smile). The suggestions are also helpful. Again, thanks. 73 Ron, wb1hga ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] 4-Line Crystals
Hi, Garey, et.al.: Your explanation of the various crystals for the 4-line made me grab my Drake 4-line manuals and look through them. The circuits for all of the crystal oscillators in the receivers, except the R-4, and the transmitters are virtually, if not, identical. Those would use the series resonant crystals. The R-4 manual states Only parallel resonant third overtone crystals designed for a Miller oscillator should be used. From the circuit it is fairly obvious that parallel resonance is required. I have used parallel resonant crystals in some of the 4-line radios and, yes, the dial and/or skirt has to be repositioned if those crystals are active if calibration is desired (handy if you are at a band edge). The T-4X manual cautions, When ordering, be sure to specify whether the crystal you are ordering is for a T-4X or R-4. They are not the same! (the exclamation point is Drake's). Curiously, Drake has in the T-4XB manual (page 25) this statement: R-4, R-4A, R-4B and T-4X, T-4XB crystals operate in the series mode and are interchangeable. Note that the R-4 is included in the list. I wonder if Drake decided after the R-4/T-4X that carrying two crystals for the same band but different resonances didn't make a lot of economic sense. In any case, as Garey implies, each crystal has two resonances and the circuit defines in which mode it will operate. 73, Bob K9JU ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] 4-Line Crystals
Bob - Correct! I think Drake just overlooked the R-4 being parallel resonant when the B manual was done. Probably lost in the day-to-day business staying IN business! :-) Just for completeness, the 2-A/B are parallel, the 2-C is series. 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 Bob Loving wrote: Hi, Garey, et.al.: Your explanation of the various crystals for the 4-line made me grab my Drake 4-line manuals and look through them. The circuits for all of the crystal oscillators in the receivers, except the R-4, and the transmitters are virtually, if not, identical. Those would use the series resonant crystals. The R-4 manual states Only parallel resonant third overtone crystals designed for a Miller oscillator should be used. From the circuit it is fairly obvious that parallel resonance is required. I have used parallel resonant crystals in some of the 4-line radios and, yes, the dial and/or skirt has to be repositioned if those crystals are active if calibration is desired (handy if you are at a band edge). The T-4X manual cautions, When ordering, be sure to specify whether the crystal you are ordering is for a T-4X or R-4. They are not the same! (the exclamation point is Drake's). Curiously, Drake has in the T-4XB manual (page 25) this statement: R-4, R-4A, R-4B and T-4X, T-4XB crystals operate in the series mode and are interchangeable. Note that the R-4 is included in the list. I wonder if Drake decided after the R-4/T-4X that carrying two crystals for the same band but different resonances didn't make a lot of economic sense. In any case, as Garey implies, each crystal has two resonances and the circuit defines in which mode it will operate. 73, Bob K9JU ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Tom Hammond, N0SS, silent key
I just saw the announcement on the QRP-L list that Tom Hammond, N0SS is now a silent key . Tom was active on the Drake list for a few years and was active with Elecraft for many years. Tom will be missed. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Tom Hammond, N0SS, silent key
Jim, That is indeed sad news. Tom was one of those special guys that knew just how to help a guy who asked. He will indeed be missed. 73, Tom, Don, WB5HAK ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
