[AMRadio] Fw: [Boatanchors] Weston Meters
Still looking for these meters - need not work. Looking particularly for milliampere meters in the range of 0-10 milliampere, 0-100 milliampere, etc. Weston 301 type or ?? Dayton spots 2354-2355 Collins Forum in Room 5 at 1:45 PM on Saturday. Thank you Dave, W3ST/W3CRA Publisher of the Collins Journal Secretary to the Collins Radio Association www.collinsra.com - the CRA Website Now with PayPal CRA Nets: 3.805 Mhz every Monday at 8 PM EDST and 14.253 Mhz every Saturday at 12 Noon EDST Collins Chatroom - Daily at 5 PM EDST on 7.208 Mhz - Original Message - From: david knepper [EMAIL PROTECTED] To: [EMAIL PROTECTED] Cc: amradio@mailman.qth.net Sent: Saturday, April 28, 2007 6:13 AM Subject: [Boatanchors] Weston Meters I am reproducing a very early Collins transmitter built in the 1930's and am looking for Weston surface mounted meters. These are the 301 series bug eye type. I will buy any that you may have. Thank you Dave, W3ST/W3CRA Publisher of the Collins Journal Secretary to the Collins Radio Association www.collinsra.com - the CRA Website Now with PayPal CRA Nets: 3.805 Mhz every Monday at 8 PM EDST and 14.253 Mhz every Saturday at 12 Noon EDST Collins Chatroom - Daily at 4 PM EDST on 7.208 Mhz ___ Boatanchors mailing list [EMAIL PROTECTED] http://mailman.qth.net/mailman/listinfo/boatanchors ** List Administrator - Duane Fischer, W8DBF/W9WZE ** ** For Assistance: [EMAIL PROTECTED] ** $$ For vintage radio info, see the HCI web site $$ http://www.w9wze.org __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Whose on 7290 at 0215?
Mike Duke, K5XU wrote: I'm hearing a word or two from an AM station on 7290. I don't think it's a bc station, but it's way down in the noise. East coasters sometimes use 40m, up around 7.290. at 9:15 last night, I was watching the San Antonio Spurs beat the Phoenix Suns to take a 2-1 lead in the Western Conference NBA semi-finals. In about 15 minutes, I'll be on 3.880Mc. -- 73 __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] Fixed Vacuum Capacitor
I'm not too sure how many of these I'll need, but I would like to find at least a couple more. They are GE part number GL-1L33 and the value is 100pf at 7500 wvdc. Physically they are approximately 4.5 inches long and 1.5 inches in diameter. Equivalent caps would be fine as long as they meet the physical and electrical criteria. You can see a picture of the capacitors at: http://amfone.net/Amforum/index.php?board=34.0 Thanks, Rick/K5IZ __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Relay K5 in BC-1T
Brian, I noticed in the manual K5 is listed as a 600 volt Time Delay Relay if that helps. My old eyes aren't that good either and I have yet to find it in the schematic or pictorials. My copy is not that good and the pictures are hard to make out. Rick/K5IZ ...Appears to me that K5 heaters are energized by K1 and in turn K5 will close and allow (some) output of the LV power supplies. I suspect this is due to letting the filaments on some of the LV tubes to light prior to plate voltage being supplied to them, 30 seconds best I can tell. Thanks, Brian / wa5am __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Manuals for BC 1 T and G
I have a full manual for the BC1 T and G on disk; I had it scanned in high res so the file is huge, I would be happy to post it to BAMMA, Two problems, I can only email 8 meg (verizon) at a time and never have uploaded to BAMMA before, if I can get some help I would be happy for all to have it Brad KB7FQR No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.7.0/803 - Release Date: 5/13/2007 12:17 PM __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Manuals for BC 1 T and G
Brad, I will create you an FTP account on my web-space where you can upload the whole thing, and I'll make certain it's to public access for downloading as well, with credit to you as of course, naming the folder with your call. Give me a day two to get it prepared, and I'll pass along the log-on parameters, etc. If you have any trouble uploading, let me know. I encourage others who might have technical things like this which need lots of space to contact me off list, and I will do the same for you, if at all possible. Thanks Brad, Brian / wa5am On 5/13/07, uvcm inc. [EMAIL PROTECTED] wrote: I have a full manual for the BC1 T and G on disk; I had it scanned in high res so the file is huge, I would be happy to post it to BAMMA, Two problems, I can only email 8 meg (verizon) at a time and never have uploaded to BAMMA before, if I can get some help I would be happy for all to have it Brad KB7FQR No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.7.0/803 - Release Date: 5/13/2007 12:17 PM __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. -- Suburbia is where the developer bulldozes out the trees, then names the streets after them. - Bill Vaughan __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] Globe Champion 350 HQ-170A
If all goes well and I can get enough space cleared, I'm going to set up my Dad's (W5JHJ) Globe Champion 350 and Hammarlund HQ-170A in my shack, alongside my TenTec Orion II. It has the original AX9909 finals and my Dad is the original owner (purchased in 1959!). I think he even has a spare set of finals for it. Aside for some mods my Dad has made over the years, it's original, as is the HQ-170A. The last time we fired them up, everything worked and it all tuned as it should have. This thing even has the 11 m band on the VFO scale (which, as I recall, is terribly inaccurate), though none of the 11 m components. I seldom see HQ-170As appear for sale and I can't think of the last time I saw a Globe Champ 350 for sale, so I have no idea what its value is; I'm guessing not much. Whatever it is, I assume it's higher with the AX9909's. Still, I've also seen some ideas about replacing the AX9909's with a pair of 4-65's. I can't however, find those posts anymore. Since the AX9909's are made of unobtainium, if they quit and the spares have a problem, I'll have to perform this mod. Are 4-65's more common? And, does anyone know the details of that mod? If not the 4-65, what would I use? Kim Elmore, N5OP __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Globe Champion 350 HQ-170A
Kim: The AX 9909s are hard to find and some people tell me they don't last very long. That I can't attest to since my Globe Champ has 8643s in the final. The article on how to make the change from AX 9909s is in ER some time back. If you need it, I can scan and email to you. The article converts the AX 9909s to 5894s, which work just fine. I made the conversion with 5894s and switched to 8643 since it has a higher plate voltage rating than the 5894. There are other tubes that can be used, but I have never seen them. If I can help, email direct and I will give you any information I have. 73 Jim/W5JO If all goes well and I can get enough space cleared, I'm going to set up my Dad's (W5JHJ) Globe Champion 350 and Hammarlund HQ-170A in my shack, alongside my TenTec Orion II. It has the original AX9909 finals and my Dad is the original owner (purchased in 1959!). I seldom see HQ-170As appear for sale and I can't think of the last time I saw a Globe Champ 350 for sale, so I have no idea what its value is; I'm guessing not much. Whatever it is, I assume it's higher with the AX9909's. Still, I've also seen some ideas about replacing the AX9909's with a pair of 4-65's. I can't however, find those posts anymore. Since the AX9909's are made of unobtainium, if they quit and the spares have a problem, I'll have to perform this mod. Are 4-65's more common? And, does anyone know the details of that mod? If not the 4-65, what would I use? Kim Elmore, N5OP __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] BC-1T
I''d like to get K5 if I can find a replacement, don't know the type yet, however it appears to be an octal plug-in. I've got other rigs that supply both LV and filament voltage as soon as they are turn on, however I wonder if anyone has some ideas of why I would really need K5 in the Gates, that is until I can find suitable replacement. GE Brian, I don't have the schematic for the BC-1T, so my comments are general in nature. I worked on one many years ago, but memories fade. A good rule of thumb with the old transmitters is that everything from start-up to shut-down worked in a sequence. Albeit pretty much mechanical at the time, it worked. As an example, rectifiers were often mercury-vapor types (e.g.-866's) and they required warm-up time. The engineers who designed these beauties knew that those employed by the local stations would be stars (aka disc jockeys) first and engineers (3rd phone ticket with permission to adjust plate voltage rheostat only) last. So they made the rigs as best they could and time-delay was a part of their scheme. I never encountered what we call today, step-start in these 1kw (often .25kw) transmitters. But the time delay relays, where used, were the next best thing. For example, they gave the old 866's a few minutes to vaporize the mercury before allowing full plate voltage to be applied. Most times it worked. Other times, when it didn't, new tubes were needed. In winter months, I would leave the filaments on in the Collins 300J and 20V-x transmitters so that a cold start the next morning wouldn't be encountered. Remote transmitter buildings were often not heated (except by the transmitter) or the heat was turned on only if the temperature inside was below 40 degrees (f). These were cost cutting measures used by management as the profit margin of the station was usually very slim. So, in the quest to return old bc transmitters to service I'd opt to find and use whatever time-delay devices were called for in the original circuits. Those octal plug T-D relays are still available if one looks far enough. However, if you are modifying the transmitter and such things as 866's are but a dim memory..then review the circuit to ensure understanding of what they were there for and then omit or substitute based on your new configuration. Hope some of this helps. It's just a bunch of thoughts stemming from those days when these wonderful transmitters were the backbone of the bc industry. 73 de W4MIL Chuck AOL now offers free email to everyone. Find out more about what's free from AOL at AOL.com. __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
[AMRadio] 7290 Last Night
Yes, I worked Bill briefly about a half hour after I sent the question about who was on 7290. The station I couldn't dig out was not him. He came on a little later, and called several cq's with a pretty decent signal despite my local noise. He was able to pull out most of my 25 watt rice box mumblings! K5XU __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] BC-1T
...however I wonder if anyone has some ideas of why I would really need K5 in the Gates, that is until I can find suitable replacement. = It's there to provide proper heating of the 866A MV rectifiers (if you haven't pulled them and substituted SS replacements) before application of their plate supply. It is there to prevent flash-over and potential destruction of that plate xformer. K7DFW ..._._ __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Relay K5 in BC-1T
Brian, Here is a scan of the sequencing circuit from the 250/1k conversion. There is probably other relative info also on the other pages. http://photos.doxaudiolab.net/displayimage.php?album=18pos=4 Bill, KB3DKS/1 __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Globe Champion 350 HQ-170A
Jim said: The AX 9909s are hard to find and some people tell me they don't last very long. Jim is correct IF you transmit prior to letting the AX9909's warm up. Why Leo Myerson's crew decided on these tubes is un-beknownst to me. However, I have been told that you need adequate warm up time, (roughly 5 min.) to help maintain a seal around the pins. All of the pins, including the plate come off of the bottom. I guess I ought to get a new low voltage transformer so I can return mine to the air. Mod-U-Lator, Mike(y) W3SLK __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Globe Champion 350 HQ-170A
Yea when are you gonna do that Mike? I keep listening for you 73 Jim/W5JO . I guess I ought to get a new low voltage transformer so I can return mine to the air. Mod-U-Lator, Mike(y) W3SLK __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] BC-1T
On 5/13/07, ROLYNN PRECHTL K7DFW [EMAIL PROTECTED] wrote: ...however I wonder if anyone has some ideas of why I would really need K5 in the Gates, that is until I can find suitable replacement. = It's there to provide proper heating of the 866A MV rectifiers (if you haven't pulled them and substituted SS replacements) before application of their plate supply. It is there to prevent flash-over and potential destruction of that plate xformer. K7DFW The tx does have ALL SS rectifiers now, from what I understand. __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
RE: [AMRadio] Manuals for BC 1 T and G
Sounds good Brad KB7FQR -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of A.R.S. - W5AMI Sent: Sunday, May 13, 2007 2:44 PM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Manuals for BC 1 T and G Brad, I will create you an FTP account on my web-space where you can upload the whole thing, and I'll make certain it's to public access for downloading as well, with credit to you as of course, naming the folder with your call. Give me a day two to get it prepared, and I'll pass along the log-on parameters, etc. If you have any trouble uploading, let me know. I encourage others who might have technical things like this which need lots of space to contact me off list, and I will do the same for you, if at all possible. Thanks Brad, Brian / wa5am On 5/13/07, uvcm inc. [EMAIL PROTECTED] wrote: I have a full manual for the BC1 T and G on disk; I had it scanned in high res so the file is huge, I would be happy to post it to BAMMA, Two problems, I can only email 8 meg (verizon) at a time and never have uploaded to BAMMA before, if I can get some help I would be happy for all to have it Brad KB7FQR No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.7.0/803 - Release Date: 5/13/2007 12:17 PM __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. -- Suburbia is where the developer bulldozes out the trees, then names the streets after them. - Bill Vaughan __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.7.0/803 - Release Date: 5/13/2007 12:17 PM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.7.0/803 - Release Date: 5/13/2007 12:17 PM __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Relay K5 in BC-1T
If the posted relay scheme is correct for your Gates, I believe both relays K5 and K6 are the old Amperite OD (On delay) type time delay relays. Probably the same type relay with different time delays. K5 is in the low voltage power supply and K6 in the high voltage circuit. More safety precauctions. They are still availableK5PMLBill Fondren A.R.S. - W5AMI [EMAIL PROTECTED] wrote: 'he current owner of the BC-1T I'm getting discovered that the plug-in reply K5 was missing. He was pretty concerned about not telling me about it before, however I laughed and told him that if he had just now discovered the 4 833's were missing, I might not be laughing. -- Suburbia is where the developer bulldozes out the trees, then names the streets after them. - Bill Vaughan __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body. __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Relay K5 in BC-1T
K5 in my Gates BC-1T was an Amperite 115 VAC glass-envelope, octal-based time-delay relay with one normally-open contact. It was 30 seconds delay, so that would be a 115NO030. I found that both time delay relay coils in the rig are actually running on 230 VAC (as are all the control circuits) with a 6k resistor in series to drop it to 115. While I was restoring my rig, I found the contacts on K5 bounced upon make, so it would have an irregular start-up time and would sometimes bounce three or four time before finally settling down. To fix the problem, I pulled the relay, wrapped it in a towel, and smashed the glass. Then I burnished the contacts, tested it, then glued a small bottle upside-down in place of the original glass. I found 30 seconds to be a bit long for the low-voltage enable delay, so I ended up replacing the Amperite with an octal programmable solid-state timer relay I had on hand set to 15 seconds. The K4 relay for the HV enable delay was excessively long too, a couple minutes as I recall, so I ultimately moved the 115NO030 to the K4 socket to become the HV inhibit TD relay. Steve WD8DAS [EMAIL PROTECTED] http://www.wd8das.net/ Radio is your best entertainment value. AOL now offers free email to everyone. Find out more about what's free from AOL at AOL.com. __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Globe Champion 350 HQ-170A
Hello Kim, Congrats on having your dad's original Globe Champion. I've had Globe Champions for years (picture on QRZ) and tried lots of different tubes in them, mostly just for fun and experimentation. The AX9909s are VERY fragile IMHO. A pentode, they remind me of a TV sweep tube. The only reason I would keep them is if you really wanted to try to keep the radio original. In that case, I would be very careful to NEVER allow them to pull a lot of plate current, especially while tuning. Almost every one I've seen cracks or leaks at the plate pin on the bottom. You can hear the tubes making crackling noises as they heat and cool during normal operation. Not very comforting. :) The 4-65's I tried for finals seemed sluggish and not very efficient at 1000vdc. I think they want more voltage. I'd recommend 5894's or that heavy duty version that W5JO mentioned. They are not too hard to find. There were lots of them produced for business radios and repeaters. They plug in the original sockets but you may have to remove the socket sub-chassis and rewire the sockets. Not too difficult. Very important to remember the filament supply voltage is 12.6v and to wire the filaments as needed. The low voltage transformer is a weak point. If you use different finals, you can solid state the plate supply to remove some load from it. This will raise the plate voltage some and I wouldn't do that with 9909's. You can plug in 811A's for the 809 modulators and run 0 volts bias. That will eliminate the negative bias rectifier for the 809's and give you heftier, easy to find modulator tubes. I like 811A's for audio tubes. Good luck getting it back on the air and let us know if you run into any problems. 73', Kent/KA5MIR On Sunday 13 May 2007 04:44:52 pm Kim Elmore wrote: If all goes well and I can get enough space cleared, I'm going to set up my Dad's (W5JHJ) Globe Champion 350 and Hammarlund HQ-170A in my shack, alongside my TenTec Orion II. It has the original AX9909 finals and my Dad is the original owner (purchased in 1959!). I think he even has a spare set of finals for it. Aside for some mods my Dad has made over the years, it's original, as is the HQ-170A. The last time we fired them up, everything worked and it all tuned as it should have. This thing even has the 11 m band on the VFO scale (which, as I recall, is terribly inaccurate), though none of the 11 m components. I seldom see HQ-170As appear for sale and I can't think of the last time I saw a Globe Champ 350 for sale, so I have no idea what its value is; I'm guessing not much. Whatever it is, I assume it's higher with the AX9909's. Still, I've also seen some ideas about replacing the AX9909's with a pair of 4-65's. I can't however, find those posts anymore. Since the AX9909's are made of unobtainium, if they quit and the spares have a problem, I'll have to perform this mod. Are 4-65's more common? And, does anyone know the details of that mod? If not the 4-65, what would I use? Kim Elmore, N5OP __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
Re: [AMRadio] Globe Champion 350 HQ-170A
Good question! Does anyone know of ANYTHING else that used an AX9909? I wonder if Amperex built them for some military project that fell through and the whole lot got sold to WRL for a song? Who else would want a tube that doesn't fit anything? Kent/KA5MIR Why Leo Myerson's crew decided on these tubes is un-beknownst to me. On Sunday 13 May 2007 05:57:00 pm Mike Sawyer wrote: Jim said: The AX 9909s are hard to find and some people tell me they don't last very long. Jim is correct IF you transmit prior to letting the AX9909's warm up. Why Leo Myerson's crew decided on these tubes is un-beknownst to me. However, I have been told that you need adequate warm up time, (roughly 5 min.) to help maintain a seal around the pins. All of the pins, including the plate come off of the bottom. I guess I ought to get a new low voltage transformer so I can return mine to the air. Mod-U-Lator, Mike(y) W3SLK __ AMRadio mailing list List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Partner Website: http://www.amfone.net Help: http://mailman.qth.net/mmfaq.html Post: mailto:AMRadio@mailman.qth.net To unsubscribe, send an email to [EMAIL PROTECTED] with the word unsubscribe in the message body.
