[Drakelist] All band TX for the TR-7
Guys the other week someone ask about all band TX for the TR7. Found this method in my notes on the TR7. There is another mod which cuts PCB traces which I think also disables the PLL out of lock TX inhibit. I think this method saves that function. To enable the TR7 to transmit on all frequencies 1.5-30MHz simply unsolder the collector of Q9001 on the DR7 board. See Figures 4-1 and 4-2 in the Service Manual. It's been quite some time since I was inside my TR7 looking for this mod, but seems to my my current TR7 uses this method. ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] uvc divider board
Curt - No, it's a 4016 / 14016, same thing. It's a quad analog switch used in the TR-7 as well. Motorola just put the '1' in front of the CMOS number. The 4066 / 14066 is the same thing too. Easy to find. 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 Curt Nixon wrote: I think he's talking about a 4016P..it is a dip package divide by N chip. I think I found one for a counter I was repairing. I'll check in the morning to see. I remember having a devil of a time finding one. Curt Garey Barrell wrote: David - If it's a 14 pin DIP package the MC14016 is available from Mouser, Digi-Key and others. It's just a CMOS Quad Analog switch. Google MC14016BCP is the plastic DIP, the MC14016BCPG is the wide temperature version. 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 David wrote: Looking for a MC4016P for a UV3 divider board. This is an obsolete part. Any sources? David Assaf, III W5XU ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Re-capping an R-4
Hi folks, I picked up an R-4 (no-suffix) about a year ago and listened on it for a while with just a random wire inside the house. Really like the radio. Back in the spring, it developed a hum, and sounded like the radio was zero-beat with a carrier wherever I tuned. I figured filter caps were bad, and probably something in the AGC circuit. I subsequently got married, moved, etc. and figured the repair would have to wait until things settled down a bit. I'm finally getting to where I can look at the rig. I opened it up, and it looks like it's never been touched inside. So, I decided to get a Hayseed can replacement for the filter caps instead of going with discrete caps. Mine has a three section 100mfd/200v can - not the 4 section Hayseed sells as a replacement. No problem, just use the three 100uF sections, ignoring the extra 22uF section. Anyway, to the point... There are about a half-dozen or so paper caps in the rig - should I routinely replace them as well? If so, any particular recommendations? I'm also planning on replacing a few tubes - in the RF am and AGC stages for starters. Any pitfalls to watch out for there? Thanks! 73 de Lee -- Lee Hiers, AA4GA www.aa4ga.com ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Identity Crisis Re: uvc divider board
Indeed, there are two multilegged creatures with the 4016 moniker. You are both correct. One is an analog switch, one is a counter. http://www.alldatasheet.com/datasheet-pdf/pdf/87112/MOTOROLA/MC4016.html http://www.ee.washington.edu/stores/DataSheets/cd4000/cd4016.pdf Call me crazy, but I suspect the one on the divider board is probably a divider... :) Either one should not be too hard to find. 73 -Jim On Sat, 08 Oct 2011 10:14:31 -0400, Garey Barrell wrote: Curt - No, it's a 4016 / 14016, same thing. It's a quad analog switch used in the TR-7 as well. Motorola just put the '1' in front of the CMOS number. The 4066 / 14066 is the same thing too. Easy to find. 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 Curt Nixon wrote: I think he's talking about a 4016P..it is a dip package divide by N chip. I think I found one for a counter I was repairing. I'll check in the morning to see. I remember having a devil of a time finding one. Curt Garey Barrell wrote: David - If it's a 14 pin DIP package the MC14016 is available from Mouser, Digi-Key and others. It's just a CMOS Quad Analog switch. Google MC14016BCP is the plastic DIP, the MC14016BCPG is the wide temperature version. 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 David wrote: Looking for a MC4016P for a UV3 divider board. This is an obsolete part. Any sources? David Assaf, III W5XU ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist -- 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] uvc divider board
Curt - OK. Guess you have to look and see what the circuit is! The standard CMOS chips are CD4016, which is a Quad Analog Switch. Motorola's version is a MC14016, which is why the 'extra' 1 at the beginning. I seem to recall now that Motorola DID have a series of 4000 chips, much like the 1 series MCL. The TR-7 uses about a half dozen of the MC14016 (CD4016) switches. Thanks for the clarification, ya gotta look at the diagram to be sure. 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 Curt Nixon wrote: Well..that may be true but here is the motorola datasheet for the MC4016 It is indeed a Mod N divide by counter.. My app was in a HP counter board. Curt Garey Barrell wrote: Curt - No, it's a 4016 / 14016, same thing. It's a quad analog switch used in the TR-7 as well. Motorola just put the '1' in front of the CMOS number. The 4066 / 14066 is the same thing too. Easy to find. 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 Curt Nixon wrote: I think he's talking about a 4016P..it is a dip package divide by N chip. I think I found one for a counter I was repairing. I'll check in the morning to see. I remember having a devil of a time finding one. Curt Garey Barrell wrote: David - If it's a 14 pin DIP package the MC14016 is available from Mouser, Digi-Key and others. It's just a CMOS Quad Analog switch. Google MC14016BCP is the plastic DIP, the MC14016BCPG is the wide temperature version. 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 David wrote: Looking for a MC4016P for a UV3 divider board. This is an obsolete part. Any sources? David Assaf, III W5XU ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] uvc divider board
So, the mc4016P is equivalent to the mc 14016P. This is a 16 DIP plastic case, divide by N from 0 to 9. The one that is bad is U 706 in the divider board used as a counter, but there are several others of this type in the circuit. If the 1 in front of the 4016 means cmos, I suppose they will work in this circuit. A UV3 gets hot (no fans, no heat sink) and I think the heat just got to it. The 14016 is listed in NTE and others and I will try to get one locally. I will keep the list posted. Many thanks for the help. It is interesting to read these threads and I imagine that all of this brain power helps keep the list members sharp; all for a common Drake cause. Thanks again. Incidentally there are factories in China that sell these... Had several emails within a few hours responding back to me. I guess they have active mining software running all of the time. Go figure. David Assaf, III W5XU -Original Message- From: Garey Barrell [mailto:k4...@mindspring.com] Sent: Saturday, October 08, 2011 11:50 AM To: Curt Nixon Cc: Curt Nixon; David; drakelist@zerobeat.net Subject: Re: [Drakelist] uvc divider board Curt - OK. Guess you have to look and see what the circuit is! The standard CMOS chips are CD4016, which is a Quad Analog Switch. Motorola's version is a MC14016, which is why the 'extra' 1 at the beginning. I seem to recall now that Motorola DID have a series of 4000 chips, much like the 1 series MCL. The TR-7 uses about a half dozen of the MC14016 (CD4016) switches. Thanks for the clarification, ya gotta look at the diagram to be sure. 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 Curt Nixon wrote: Well..that may be true but here is the motorola datasheet for the MC4016 It is indeed a Mod N divide by counter.. My app was in a HP counter board. Curt Garey Barrell wrote: Curt - No, it's a 4016 / 14016, same thing. It's a quad analog switch used in the TR-7 as well. Motorola just put the '1' in front of the CMOS number. The 4066 / 14066 is the same thing too. Easy to find. 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 Curt Nixon wrote: I think he's talking about a 4016P..it is a dip package divide by N chip. I think I found one for a counter I was repairing. I'll check in the morning to see. I remember having a devil of a time finding one. Curt Garey Barrell wrote: David - If it's a 14 pin DIP package the MC14016 is available from Mouser, Digi-Key and others. It's just a CMOS Quad Analog switch. Google MC14016BCP is the plastic DIP, the MC14016BCPG is the wide temperature version. 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 David wrote: Looking for a MC4016P for a UV3 divider board. This is an obsolete part. Any sources? David Assaf, III W5XU - No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.1831 / Virus Database: 2085/4543 - Release Date: 10/07/11 - No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.1831 / Virus Database: 2085/4543 - Release Date: 10/07/11 ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] All band TX for the TR-7
One way to provide additional band slots for the transmit and receive is to find and place an Aux-7 board in the radio. These are hard to find. The solution I use on the several TR-7 units I have had is to use the scheme of Robert Morrow, WB6GTM in the July 1982, QST. It is a diode programmable board for any 500 KC segment. The boards I used were made by Farr radio (probably still available) and plug into the aux 7 slot. Work fine and no surgery is required.. David Assaf, III W5XU -Original Message- From: drakelist-boun...@zerobeat.net [mailto:drakelist-boun...@zerobeat.net] On Behalf Of Jim Shorney Sent: Saturday, October 08, 2011 10:12 AM To: drakelist@zerobeat.net Subject: Re: [Drakelist] All band TX for the TR-7 On Sat, 8 Oct 2011 04:34:36 -0700 (PDT), Ron wrote: To enable the TR7 to transmit on all frequencies 1.5-30MHz simply unsolder the collector of Q9001 on the DR7 board. See Figures 4-1 and 4-2 in the Service Manual. The method I arrived at was actually an outgrowth of this mod, which I found published on GW4ALG's web site. The Q9001 mod leaves out the 2.5 and 5.0 MHz bands, but they can be restored by a trace cut on the digital control board. Since the collector of Q9001 toggles a signal on the digital control board, both mods can effectively both be done on the digital control board and the OOL signal is preserved. 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 - No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.1831 / Virus Database: 2085/4543 - Release Date: 10/07/11 ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] uvc divider board
David - I'm afraid I misled you on the MC14016 chip. That is a quad analog switch, same thing as a CD4016. Your chip is a programmable counter MC4016 as Curt said, and considerably harder to find. The only other thing I would say is the 'Chinese parts' are sometimes counterfeit or bad. 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 David wrote: So, the mc4016P is equivalent to the mc 14016P. This is a 16 DIP plastic case, divide by N from 0 to 9. The one that is bad is U 706 in the divider board used as a counter, but there are several others of this type in the circuit. If the 1 in front of the 4016 means cmos, I suppose they will work in this circuit. A UV3 gets hot (no fans, no heat sink) and I think the heat just got to it. The 14016 is listed in NTE and others and I will try to get one locally. I will keep the list posted. Many thanks for the help. It is interesting to read these threads and I imagine that all of this brain power helps keep the list members sharp; all for a common Drake cause. Thanks again. Incidentally there are factories in China that sell these... Had several emails within a few hours responding back to me. I guess they have active mining software running all of the time. Go figure. David Assaf, III W5XU -Original Message- From: Garey Barrell [mailto:k4...@mindspring.com] Sent: Saturday, October 08, 2011 11:50 AM To: Curt Nixon Cc: Curt Nixon; David; drakelist@zerobeat.net Subject: Re: [Drakelist] uvc divider board Curt - OK. Guess you have to look and see what the circuit is! The standard CMOS chips are CD4016, which is a Quad Analog Switch. Motorola's version is a MC14016, which is why the 'extra' 1 at the beginning. I seem to recall now that Motorola DID have a series of 4000 chips, much like the 1 series MCL. The TR-7 uses about a half dozen of the MC14016 (CD4016) switches. Thanks for the clarification, ya gotta look at the diagram to be sure. 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 Curt Nixon wrote: Well..that may be true but here is the motorola datasheet for the MC4016 It is indeed a Mod N divide by counter.. My app was in a HP counter board. Curt Garey Barrell wrote: Curt - No, it's a 4016 / 14016, same thing. It's a quad analog switch used in the TR-7 as well. Motorola just put the '1' in front of the CMOS number. The 4066 / 14066 is the same thing too. Easy to find. 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 CDswww.k4oah.com Curt Nixon wrote: I think he's talking about a 4016P..it is a dip package divide by N chip. I think I found one for a counter I was repairing. I'll check in the morning to see. I remember having a devil of a time finding one. Curt Garey Barrell wrote: David - If it's a 14 pin DIP package the MC14016 is available from Mouser, Digi-Key and others. It's just a CMOS Quad Analog switch. Google MC14016BCP is the plastic DIP, the MC14016BCPG is the wide temperature version. 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 CDswww.k4oah.com David wrote: Looking for a MC4016P for a UV3 divider board. This is an obsolete part. Any sources? David Assaf, III W5XU ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] T4XB Part Needed
Greetings Group, I need a On/Off power switch and gain control. It is listed on the schematic as R79, 84 Control Var. resistor to complete my restoration of a T4XB. Is there anyone out there who sells parts or know of a source for this part ? Thanks. 73 Gary K7OX ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] UV-3 front panel
Looking for a UV-3 front panel in good condition. Denny Dollahon, kj6...@yahoo.com___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] [DrakeRadio] Re-capping an R-4
Garey, Your purchase is definitely the better value although I'm not sure if DeOxit has a shelf life? Come to think of it, is there a shelf life for most of these products? I have cleaners on the bench that are now 15+ years old! Where do you find the Chemtronic stuff. For the past 20 years, I've been purchasing the Chemtronics cleaners lubricants through Mouser and Newark. The first Chemtronics product I used as a teenager was Tune-O-Wash, sill made today but is now EPA compliant. That product worked better than most for electro-mechanical TV tuners and would not de-tune the circuits. Getting a bit off topic here, but I once tried the RadioShack tuner cleaner/lubricant and never could get a tuner back in alignment. God only knows what semi-conductive fluid they used. This was in the mid '70s. Paul, W9AC - Original Message - From: Garey Barrell k4...@mindspring.com To: drakera...@yahoogroups.com Cc: Paul Christensen w...@arrl.net Sent: Saturday, October 08, 2011 4:27 PM Subject: Re: [DrakeRadio] Re-capping an R-4 This is what I use. *http://tinyurl.com/45yqnfd* 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 Paul Christensen wrote: And here's the same 100% solution the D100S spray: http://tinyurl.com/3jqhxk2 Paul, W9AC - Original Message - From: Paul Christensen To: drakera...@yahoogroups.com Sent: Saturday, October 08, 2011 2:16 PM Subject: Re: [DrakeRadio] Re-capping an R-4 Don, I recently made a purchase of the 2.4 ml bottle for $15 through Amazon. I combined it with some other solvents and shipping was free. I've stopped using DeOxit on wafer switches and now pretty much limit its use to pots/faders. I have not had any trouble with DeOxit on wafer switches, but I've seen evidence of the dirt/dust it attracts over time. So now, I'm using several fast-evaporating Chemtronics sprays and the results have been just as good as DeOxit on open switches. For example, I recently purchased a Collins 75S-3C and the band switch was so intermittent, I thought it was broken. I used the Chemtronics spray developed for switch contacts and the bandswitch operates like new. Paul, W9AC - Original Message - From: Don Cunningham To: drakera...@yahoogroups.com Sent: Saturday, October 08, 2011 2:01 PM Subject: Re: [DrakeRadio] Re-capping an R-4 Garey, Where did you find the D100L DeOxit?? I need to get a bottle (even if it hurts) as I am getting stocked up to do a BUNCH of rigs this winter. Hope my ambition holds out. I've been helping Hayseed's sales, HI. 73, Don, WB5HAK ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] uvc divider board
The easiest way to determine which one is correct is that the MC4016 divider IC is a 16 pin part and the 4016 analog switch is a 14 pin part. Mike W6MXV - Original Message - From: David w...@cox.net To: k4...@mindspring.com; 'Curt Nixon' captc...@flash.net Cc: drakelist@zerobeat.net Sent: Saturday, October 08, 2011 2:53 PM Subject: Re: [Drakelist] uvc divider board So, the mc4016P is equivalent to the mc 14016P. This is a 16 DIP plastic case, divide by N from 0 to 9. The one that is bad is U 706 in the divider board used as a counter, but there are several others of this type in the circuit. If the 1 in front of the 4016 means cmos, I suppose they will work in this circuit. A UV3 gets hot (no fans, no heat sink) and I think the heat just got to it. The 14016 is listed in NTE and others and I will try to get one locally. I will keep the list posted. Many thanks for the help. It is interesting to read these threads and I imagine that all of this brain power helps keep the list members sharp; all for a common Drake cause. Thanks again. Incidentally there are factories in China that sell these... Had several emails within a few hours responding back to me. I guess they have active mining software running all of the time. Go figure. David Assaf, III W5XU ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] R7 crystals
Sorry to interrupt, but does the R7 aux board use the R4 crystals or the SPR4 crystals? ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] Deoxit...
I bought a 2mL container of Deoxit 100% together with order for couple of tubes. So far, I have yet to use Deoxit on anything, previous postings have made me leary. I'm understanding one drop on the stationary contact, then rotation? Then using industrial qtip to pick up the results? ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Deoxit...
I've used Deoxit for quite a while with very good results. (This is the Caig product, not the Radio Shack product with a *very* similar name.) As far as application, I use one of three methods: 1) Wet the sharp end of a toothpick and use that to apply. I use this for tube.transistor sockets usually. 2) Wet a Q-tip (other other similar product) and use that to apply. This I sometimes use for switch contacts. 3) Use a hypodermic needle to apply (usually 25ga or smaller needle). This I also use for switch contacts. The one caution is to be aware that some phenolic compounds can soak up the Deoxit. If the phenolic is part of a switch, this may cause unwanted leakage currents to flow. The only cure I have heard of is to replace the phenolic. (Difficult with older/obsolete equipment.) Also, you should wait until the Deoxit has evaporated. While wet, it is conductive. Just my $.02 :-) 73 - Mark N1VQW ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] All band TX for the TR-7
There's more than one way to skin a cat. You can fake an AUX-7 by installing diode networks on the bottom of the parent board, similar to this: http://www.dproducts.be/drake_museum/rx_0-1_5_mhz.htm It can get ugly, but if you only want, for example, WARC bands or VLF receive, it's not too bad. 73 -Jim On Sat, 8 Oct 2011 14:05:26 -0500, David wrote: One way to provide additional band slots for the transmit and receive is to find and place an Aux-7 board in the radio. These are hard to find. The solution I use on the several TR-7 units I have had is to use the scheme of Robert Morrow, WB6GTM in the July 1982, QST. It is a diode programmable board for any 500 KC segment. The boards I used were made by Farr radio (probably still available) and plug into the aux 7 slot. Work fine and no surgery is required.. -- 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] [DrakeRadio] Re-capping an R-4
Paul - I'm sure it has a recommended shelf life, but the bottle I just finished off (about 1/4 in the bottom) is at least 15 years old and still seems to clean just fine. I always keep it capped. Actually the only problem I had with it was that the bottle became 'deformed', i.e., pushed in on one side, so I couldn't get much pressure on it! Yeah, we used Freon TF in spray cans at NASA 40 years ago. Really did a nice job on just about anything from PC boards to machine parts, and left NO residue or film or anything. Course I don''t guess we did the ozone layer any good either... :-) 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 Paul Christensen wrote: Garey, Your purchase is definitely the better value although I'm not sure if DeOxit has a shelf life? Come to think of it, is there a shelf life for most of these products? I have cleaners on the bench that are now 15+ years old! Where do you find the Chemtronic stuff. For the past 20 years, I've been purchasing the Chemtronics cleaners lubricants through Mouser and Newark. The first Chemtronics product I used as a teenager was Tune-O-Wash, sill made today but is now EPA compliant. That product worked better than most for electro-mechanical TV tuners and would not de-tune the circuits. Getting a bit off topic here, but I once tried the RadioShack tuner cleaner/lubricant and never could get a tuner back in alignment. God only knows what semi-conductive fluid they used. This was in the mid '70s. Paul, W9AC - Original Message - From: Garey Barrell k4...@mindspring.com To: drakera...@yahoogroups.com Cc: Paul Christensen w...@arrl.net Sent: Saturday, October 08, 2011 4:27 PM Subject: Re: [DrakeRadio] Re-capping an R-4 This is what I use. *http://tinyurl.com/45yqnfd* 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 Paul Christensen wrote: And here's the same 100% solution the D100S spray: http://tinyurl.com/3jqhxk2 Paul, W9AC - Original Message - From: Paul Christensen To: drakera...@yahoogroups.com Sent: Saturday, October 08, 2011 2:16 PM Subject: Re: [DrakeRadio] Re-capping an R-4 Don, I recently made a purchase of the 2.4 ml bottle for $15 through Amazon. I combined it with some other solvents and shipping was free. I've stopped using DeOxit on wafer switches and now pretty much limit its use to pots/faders. I have not had any trouble with DeOxit on wafer switches, but I've seen evidence of the dirt/dust it attracts over time. So now, I'm using several fast-evaporating Chemtronics sprays and the results have been just as good as DeOxit on open switches. For example, I recently purchased a Collins 75S-3C and the band switch was so intermittent, I thought it was broken. I used the Chemtronics spray developed for switch contacts and the bandswitch operates like new. Paul, W9AC - Original Message - From: Don Cunningham To: drakera...@yahoogroups.com Sent: Saturday, October 08, 2011 2:01 PM Subject: Re: [DrakeRadio] Re-capping an R-4 Garey, Where did you find the D100L DeOxit?? I need to get a bottle (even if it hurts) as I am getting stocked up to do a BUNCH of rigs this winter. Hope my ambition holds out. I've been helping Hayseed's sales, HI. 73, Don, WB5HAK ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
[Drakelist] TR4C, AC4, MS4 for sale
My retirement has forced me to downsize as the cost of living forces my limited budget to re=prioritize and inevitable relocation to a smaller apartment. This radio is in excellent working condition and ready to play. It also comes with (extra) spare 3 matched set tubes (finals) without cost. The AC4 has been rebuilt by previous owner. I have owned this radio for 4 years (or maybe 3). pix sent on request. $540.00 plus shipping I will miss this radio. I hope to find this radio a good home. Please reply direct, thank you. Ron, wb1hga ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] [DrakeRadio] Re-capping an R-4
Yeah, we used Freon TF in spray cans at NASA 40 years ago. Garey, This is what happens when I'm all caught up with my chores and it's raining the entire weekend. Turns out that Caig makes a Freon TF substitute called Caikleen NF. Seems to have many of the same properties and might be worth adding to the shop solvent cabinet. http://store.caig.com/s.nl/ctype.KB/it.I/id.394/KB.218/.f Paul, W9AC ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] R7 crystals
On Sat, 8 Oct 2011 13:53:21 -0700 (PDT), Neil M Califano wrote: Sorry to interrupt, but does the R7 aux board use the R4 crystals or the SPR4 crystals? Neither. From the AUX-7 manual: The AUX7 is a plug-in unit which allows the user to program up to 8 auxiliary 500 kHz frequency ranges for instant selection from the front panel of a TR7 or R7. In addition, a crystal socket is provided for each of the eight auxiliary ranges to allow fixed frequency receive and/or transmit (in the case of a TR7) operation within a selected range. Note that each range module socket has a corresponding crystal socket. To operate on a fixed receive and/or transmit (in the case of a TR7) frequency within a selected range, the proper crystal must be installed in the socket corresponding to the appropriate range module. Use the following formula to determine the crystal frequency: Crystal Freq. (kHz) = 5050.0 kHz + Desired Carrier Frequency (kHz) - Lowest Range Frequency (kHz). For example, suppose it is desired to operate on a fixed carrier frequency of 4358.6 kHz. Referring to figure 1, this frequency falls in the 4.0-4.5 MHz range, so a range module must be programmed by clipping pins 2, 3, 4, 9, 11, 12, and 14. This module should be installed in the desired channel location on the AUX7. Channel crystal carrier frequency is then calculated as follows: 5050.0 kHz + 4358.6 kHz - 4000.0 kHz = 5408.6 kHz Thus, a 5408.6 kHz crystal is required for fixed operation on 4358.6 kHz, along with the appropriate range module. Note that the fixed crystals will always fall in the range 5050.0 kHz to 5550 kHz. When ordering a fixed channel crystal, always specify the following information: 1. Crystal frequency in kHz. 2. Frequency tolerance + .003% or better. 3. Parallel resonant, 32 pf load. 4. Series resistance 35 ohms, maximum. 5. HC-25/U Holder. Crystals of this type are available from several manufacturers, or can be obtained on a special order basis from the R. L. Drake Company. 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
[Drakelist] UV3 divider board troubleshooting
David How were you able to probe the board to find the fault while installed into the UV-3 ? Do you have the extender cards ? Paul - WB2NMI - Original Message - From: David w...@cox.net To: drakelist@zerobeat.net Sent: Fri, 07 Oct 2011 21:52:59 -0400 (EDT) Subject: [Drakelist] uvc divider board Looking for a MC4016P for a UV3 divider board. This is an obsolete part. Any sources? David Assaf, III W5XU ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
