Re: [Drakelist] Need a fan for my T-4XC Transmitter?
BE VERY CAREFULIn many (most?) of the 4 line, the 12V filament circuit has its center tap grounded so the 6v filaments work from each half of the 12V winding to ground. If you ground either side of the 12V line to the RCA jack, you short out half of the 12V...with luck, you blow the filament fuse..no luck and you smoke something else. If you use the 12V filaments to run a rectifier ( I use a bridge device) DO NOT ground either side of the DC output, FYI Curt KU8L On 1/8/2012 7:45 PM, Steve Wedge wrote: I've done all which-ways. I once used a 120V fan and used a big, honkin' wire-wound resistor to slow it down. I currently use a 12V fan with a thermistor over my finals, running off a 12V wall wart. the fan runs really slow until the temp gets to the point where the thermistor lets it go for full-speed. This fan cost me $5 at a hamfest. I've worked on a couple of R-4B's where the previous owner tapped off the filament supply with a diode and cap (half-wave rectifier). The fans he used are a little louder than my Xmitter fan. If you opt for using on-board power, you can tap off the filament supply for 12V and feed it to an RCA jack in the SPARE location, or just feed wires through that hole. I like just setting the fan on top, using rubber feet. No holes get drilled that way... YMMV, Steve Wedge, W1ES/4 Live free or die: Death is not the worst of evils. John Stark. All my computers have my signature with various pearls of wisdom appended thereto. *From:* Michael Sue Trussell mailto:mtruss8...@comcast.net *Sent:* Saturday, January 07, 2012 5:33 PM *To:* drakelist@zerobeat.net mailto:drakelist@zerobeat.net *Subject:* [Drakelist] Need a fan for my T-4XC Transmitter? I need to replace my old 30 year old 110 volt fan on my transmitter. I know a few of you have used the twelve 12 volt fans and some have used the 110 volt version. What I would like to know where I can get power so I don't have to plug the fan in every time I turn the rig on. I would like the fan to come on when I turn on the power to the transmitter, any suggestions? Thank you in advance Michael J Trussell KA8ASN ___ 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] Need a fan for my T-4XC Transmitter?
Curt - The 4 Line receivers have Ground - 6V - 12V. So one 12V line is grounded. The R-4C has only 6 VAC filaments. The transmitters and TR-(any) have only a single 12 VAC filament supply. Be careful where you get the voltage here, as there are several series string arrangements to power 6 VAC tubes. 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 wrote: BE VERY CAREFULIn many (most?) of the 4 line, the 12V filament circuit has its center tap grounded so the 6v filaments work from each half of the 12V winding to ground. If you ground either side of the 12V line to the RCA jack, you short out half of the 12V...with luck, you blow the filament fuse..no luck and you smoke something else. If you use the 12V filaments to run a rectifier ( I use a bridge device) DO NOT ground either side of the DC output, FYI Curt KU8L On 1/8/2012 7:45 PM, Steve Wedge wrote: I've done all which-ways. I once used a 120V fan and used a big, honkin' wire-wound resistor to slow it down. I currently use a 12V fan with a thermistor over my finals, running off a 12V wall wart. the fan runs really slow until the temp gets to the point where the thermistor lets it go for full-speed. This fan cost me $5 at a hamfest. I've worked on a couple of R-4B's where the previous owner tapped off the filament supply with a diode and cap (half-wave rectifier). The fans he used are a little louder than my Xmitter fan. If you opt for using on-board power, you can tap off the filament supply for 12V and feed it to an RCA jack in the SPARE location, or just feed wires through that hole. I like just setting the fan on top, using rubber feet. No holes get drilled that way... YMMV, Steve Wedge, W1ES/4 Live free or die: Death is not the worst of evils. John Stark. All my computers have my signature with various pearls of wisdom appended thereto. *From:* Michael Sue Trussell mailto:mtruss8...@comcast.net *Sent:* Saturday, January 07, 2012 5:33 PM *To:* drakelist@zerobeat.net mailto:drakelist@zerobeat.net *Subject:* [Drakelist] Need a fan for my T-4XC Transmitter? I need to replace my old 30 year old 110 volt fan on my transmitter. I know a few of you have used the twelve 12 volt fans and some have used the 110 volt version. What I would like to know where I can get power so I don’t have to plug the fan in every time I turn the rig on. I would like the fan to come on when I turn on the power to the transmitter, any suggestions? Thank you in advance Michael J Trussell KA8ASN ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Need a fan for my T-4XC Transmitter?
Everything on my radio bench is plugged into a suitably large power strip (I run my T4X barefoot). The wall wart for the fan is plugged into it, as is the soldering iron. This has the benefit of ensuring nothing is left on unintentionally. Chuck, K1OM On Sat, Jan 7, 2012 at 5:33 PM, Michael Sue Trussell mtruss8...@comcast.net wrote: I need to replace my old 30 year old 110 volt fan on my transmitter. I know a few of you have used the twelve 12 volt fans and some have used the 110 volt version. What I would like to know where I can get power so I don’t have to plug the fan in every time I turn the rig on. I would like the fan to come on when I turn on the power to the transmitter, any suggestions? ** ** Thank you in advance ** ** Michael J Trussell KA8ASN ___ 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] Need a fan for my T-4XC Transmitter?
I've done all which-ways. I once used a 120V fan and used a big, honkin' wire-wound resistor to slow it down. I currently use a 12V fan with a thermistor over my finals, running off a 12V wall wart. the fan runs really slow until the temp gets to the point where the thermistor lets it go for full-speed. This fan cost me $5 at a hamfest. I've worked on a couple of R-4B's where the previous owner tapped off the filament supply with a diode and cap (half-wave rectifier). The fans he used are a little louder than my Xmitter fan. If you opt for using on-board power, you can tap off the filament supply for 12V and feed it to an RCA jack in the SPARE location, or just feed wires through that hole. I like just setting the fan on top, using rubber feet. No holes get drilled that way... YMMV, Steve Wedge, W1ES/4 Live free or die: Death is not the worst of evils. John Stark. All my computers have my signature with various pearls of wisdom appended thereto. From: Michael Sue Trussell Sent: Saturday, January 07, 2012 5:33 PM To: drakelist@zerobeat.net Subject: [Drakelist] Need a fan for my T-4XC Transmitter? I need to replace my old 30 year old 110 volt fan on my transmitter. I know a few of you have used the twelve 12 volt fans and some have used the 110 volt version. What I would like to know where I can get power so I don't have to plug the fan in every time I turn the rig on. I would like the fan to come on when I turn on the power to the transmitter, any suggestions? Thank you in advance Michael J Trussell KA8ASN ___ 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] Need a fan for my T-4XC Transmitter?
I've used a couple silicon diodes in series in a sleeve of shrink wrap to slow the fDC ans down a bit too... or, use a 9V wall wart. The fans are almost free these days and it doesn't take a huge one to make a big difference in the temp in the radio. 73 John K5MO At 07:45 PM 1/8/2012, Steve Wedge wrote: I've done all which-ways. I once used a 120V fan and used a big, honkin' wire-wound resistor to slow it down. I currently use a 12V fan with a thermistor over my finals, running off a 12V wall wart. the fan runs really slow until the temp gets to the point where the thermistor lets it go for full-speed. This fan cost me $5 at a hamfest. I've worked on a couple of R-4B's where the previous owner tapped off the filament supply with a diode and cap (half-wave rectifier). The fans he used are a little louder than my Xmitter fan. If you opt for using on-board power, you can tap off the filament supply for 12V and feed it to an RCA jack in the SPARE location, or just feed wires through that hole. I like just setting the fan on top, using rubber feet. No holes get drilled that way... YMMV, Steve Wedge, W1ES/4 Live free or die: Death is not the worst of evils. John Stark. All my computers have my signature with various pearls of wisdom appended thereto. From: mailto:mtruss8...@comcast.netMichael Sue Trussell Sent: Saturday, January 07, 2012 5:33 PM To: mailto:drakelist@zerobeat.netdrakelist@zerobeat.net Subject: [Drakelist] Need a fan for my T-4XC Transmitter? I need to replace my old 30 year old 110 volt fan on my transmitter. I know a few of you have used the twelve 12 volt fans and some have used the 110 volt version. What I would like to know where I can get power so I don't have to plug the fan in every time I turn the rig on. I would like the fan to come on when I turn on the power to the transmitter, any suggestions? Thank you in advance Michael J Trussell KA8ASN -- ___ 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] Need a fan for my T-4XC Transmitter?
or you could use one of my new fan controllers for the drake radios mike On Jan 8, 2012, at 7:45 PM, Steve Wedge wrote: I've done all which-ways. I once used a 120V fan and used a big, honkin' wire-wound resistor to slow it down. I currently use a 12V fan with a thermistor over my finals, running off a 12V wall wart. the fan runs really slow until the temp gets to the point where the thermistor lets it go for full-speed. This fan cost me $5 at a hamfest. I've worked on a couple of R-4B's where the previous owner tapped off the filament supply with a diode and cap (half-wave rectifier). The fans he used are a little louder than my Xmitter fan. If you opt for using on-board power, you can tap off the filament supply for 12V and feed it to an RCA jack in the SPARE location, or just feed wires through that hole. I like just setting the fan on top, using rubber feet. No holes get drilled that way... YMMV, Steve Wedge, W1ES/4 Live free or die: Death is not the worst of evils. John Stark. All my computers have my signature with various pearls of wisdom appended thereto. From: Michael Sue Trussell Sent: Saturday, January 07, 2012 5:33 PM To: drakelist@zerobeat.net Subject: [Drakelist] Need a fan for my T-4XC Transmitter? I need to replace my old 30 year old 110 volt fan on my transmitter. I know a few of you have used the twelve 12 volt fans and some have used the 110 volt version. What I would like to know where I can get power so I don’t have to plug the fan in every time I turn the rig on. I would like the fan to come on when I turn on the power to the transmitter, any suggestions? Thank you in advance Michael J Trussell KA8ASN ___ 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] Need a fan for my T-4XC Transmitter?
I need to replace my old 30 year old 110 volt fan on my transmitter. I know a few of you have used the twelve 12 volt fans and some have used the 110 volt version. What I would like to know where I can get power so I don't have to plug the fan in every time I turn the rig on. I would like the fan to come on when I turn on the power to the transmitter, any suggestions? Thank you in advance Michael J Trussell KA8ASN ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
Re: [Drakelist] Need a fan for my T-4XC Transmitter?
See these pics. the power comes from the 12v filament system. https://picasaweb.google.com/captcurt08/DrakeFanInstall https://picasaweb.google.com/captcurt08/R4BFan?authkey=Gv1sRgCP_B8eCBk669Wg If you have any questions, email me. Curt KU8L On 1/7/2012 5:33 PM, Michael Sue Trussell wrote: I need to replace my old 30 year old 110 volt fan on my transmitter. I know a few of you have used the twelve 12 volt fans and some have used the 110 volt version. What I would like to know where I can get power so I don't have to plug the fan in every time I turn the rig on. I would like the fan to come on when I turn on the power to the transmitter, any suggestions? Thank you in advance Michael J Trussell KA8ASN ___ 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] Need a fan for my T-4XC Transmitter?
Well, given the low cost of surplus DC fans, the low noise when running them on lower voltages, and the modest energy consumptionI just leave mine on all the time! On 1/7/12, Michael Sue Trussell mtruss8...@comcast.net wrote: I need to replace my old 30 year old 110 volt fan on my transmitter. I know a few of you have used the twelve 12 volt fans and some have used the 110 volt version. What I would like to know where I can get power so I don't have to plug the fan in every time I turn the rig on. I would like the fan to come on when I turn on the power to the transmitter, any suggestions? Thank you in advance Michael J Trussell KA8ASN ___ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
