[AMRadio] Re: ICE STORM
-Original Message- From: Joe Crawford I knew a guy who used a 30 amp variac to feed a 5 volt, 30 amp filament transformer on his quad driven element.Worked real good to melt the ice. Joe W4AAB Joe, This is a great idea but the variac can be much smaller. The current needed is reduced by the turns ratio of that filament transformer. If the primary is 120 vac, then the turns ratio is 120/5 or 24. Therefore, if we take the 30 amps and divide that by 24 we get 1.25 amperes. The variac only needs to be rated for a little over one ampere. I might be tempted to use a light bulb in series with that transformer primary where the current to the load will vary by the bulb wattage rating, and the load resistance. Remember that the resistance of the bulb is very non linear where the cold filament has a much lower resistance than a hot filament. So I'd start with a 100 watt bulb and see if that works. I would not go over 150 watts with the bulb rating though. Having a clamp on AC current probe would be handy in a case like this. I picked another solution to the ice storms. Back in 1976 I moved to central Texas. Getting any ice or snow here is pretty rare. ;-) Regards, Jim WD5JKO __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] Re: ICE STORM
I realize that one could use one smaller, but if you got a 30 amp on hand, crank it up. I have been doing this electronics thing for 35+ years, so familiar with turns ratio, etc.It is good to have things like variacs, like the one I got from WA2RQY recently. Nice to put in 0-140 and get out 0-260 VAC!! Joe W4AAB - Original Message - From: Jim Candela [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Sunday, March 09, 2008 8:56 AM Subject: [AMRadio] Re: ICE STORM -Original Message- From: Joe Crawford I knew a guy who used a 30 amp variac to feed a 5 volt, 30 amp filament transformer on his quad driven element.Worked real good to melt the ice. Joe W4AAB Joe, This is a great idea but the variac can be much smaller. The current needed is reduced by the turns ratio of that filament transformer. If the primary is 120 vac, then the turns ratio is 120/5 or 24. Therefore, if we take the 30 amps and divide that by 24 we get 1.25 amperes. The variac only needs to be rated for a little over one ampere. I might be tempted to use a light bulb in series with that transformer primary where the current to the load will vary by the bulb wattage rating, and the load resistance. Remember that the resistance of the bulb is very non linear where the cold filament has a much lower resistance than a hot filament. So I'd start with a 100 watt bulb and see if that works. I would not go over 150 watts with the bulb rating though. Having a clamp on AC current probe would be handy in a case like this. I picked another solution to the ice storms. Back in 1976 I moved to central Texas. Getting any ice or snow here is pretty rare. ;-) Regards, Jim WD5JKO __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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. __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] Re: ICE STORM
The quad, folded dipole and loop are the only types of antennas that I can think of where this would work. You have a complete circuit with them. A dipole or beam doesn't have that unless you have a balun on them. In that case, the current would go up the feedline to the balun and come right back, doing nothing for the antenna itself. Many broadcast antennas use this scheme, but they are folded dipoles. Jim/W5JO -Original Message- From: Joe Crawford I knew a guy who used a 30 amp variac to feed a 5 volt, 30 amp filament transformer on his quad driven element.Worked real good to melt the ice. Joe W4AAB Joe, This is a great idea but the variac can be much smaller. The current needed is reduced by the turns ratio of that filament transformer. If the primary is 120 vac, then the turns ratio is 120/5 or 24. Therefore, if we take the 30 amps and divide that by 24 we get 1.25 amperes. The variac only needs to be rated for a little over one ampere. I might be tempted to use a light bulb in series with that transformer primary where the current to the load will vary by the bulb wattage rating, and the load resistance. Remember that the resistance of the bulb is very non linear where the cold filament has a much lower resistance than a hot filament. So I'd start with a 100 watt bulb and see if that works. I would not go over 150 watts with the bulb rating though. Having a clamp on AC current probe would be handy in a case like this. I picked another solution to the ice storms. Back in 1976 I moved to central Texas. Getting any ice or snow here is pretty rare. ;-) Regards, Jim WD5JKO __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] W1EUJ-Sale of Radio Collection-Low Prices-Pickup-Only-Lexington MA
*REMINDER - ITEMS WILL NOT BE SHIPPING IN THIS ROUND OF SALE* Hello All, For multitude of reasons (going back to school, recent life changes), I would like to sell off my old radio collection. I would like to start by offering, at low prices, items in my collection to anybody who can just come and pick it up at my QTH (Lexington, MA - good in callbook). There is alot of stuff, here are some highlights: Prices are all O.B.O. $150 Hallicrafters SX-28, complete, with S-meter $100 2 National RAS recievers (1 parts unit) with all tuning coil racks, 1 Lamda regulated P.S. $100 1 Hammarlund SP-200 (working) with a homebrew P.S. (formerly W1DAN's) $75 1 Hammarlund SP-200 with repainted front panel and original P.S. (some mods) $25 1 unknown mfg Coast Guard MF receiver $75 Heathkit DX-60B and HG-10B set, very clean $10 Military LM-7 calibrator $15 Hallicrafters S-40 $30 Military FRR-21 VLF receiver - best you will ever find $30 Hallicrafters R-44 speaker $25 Medium Power Balanced Feedline Tuner Available in two weeks will be the complete BC-610E with complete spare set of NOS 100TH and 250TH tubes, coils, most TUs, and a spare RF deck, AND speech unit w/ parts unit for it. $400 I also have an mass of parts - transformers, capacitors (variable and oil-filled), meters, etc. Iron and caps goes for $0.10 - $0.50 a unit (do have some BC-610 iron). Selling all small items by the box - $5 per whatever can be stuffed into a Staples 9 x 12 x 4 shipping box (some boxes available to take items in). Old handbooks, manuals available. Reel-to-reel tape collection too. My garage and basement will be open on Saturday, from 8 AM - Noon, for the next four weeks, may continue depending on remaining stock of items. FIrst come, first served - no holds. AGAIN, NO SHIPPING FOR ANY OF THE ITEMS LISTED AT THIS TIME. Thanks all. Let my life-change be your benefit. Spread the word. David Goncalves W1EUJ 111 Lowell Street Lexington, MA 02420 (781) 862-0015 (no later than 11 PM) __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] Recapping a DX-100
Hi everybody, I recently had a DX-100 fall into my lap. Cosmetically it is immaculate inside. Outside needs a little soap water but there are no scratches or wear marks. AND... No hack jobs or extra holes drilled into it. It came to me with the enclosure too. My questions: 1 - Has anyone created a recap/mod kit for this? The radio needs a recap plus the mods that are posted on the Intraweb. :-) 2- Any good sourced for tubes? 3 - Are there any suggestions as to what the caps or other key components should be replaced with? (modern day equivalent) Thanks for reading this... 73, cul... Bob de k2ki __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] Recapping a DX-100
Recently someone was offering DX-60 recap kits but I have not seen anyone offer one for the DX-100. I did mine the usual way by researching the mods, creating a parts list, and ordering them from Mouser. Tom K3TVC __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] Ice Storm
What's Ice??? Dave N7RK Phoenix, Arizona -- *** Dave N7RK Boatanchors Home Page: http://members.cox.net/n7rk Phoenix, Arizona *DXCC Honor Roll**WAZ#22 - 75 Meter SSB* ex-XE2/N7RK, N7RK/ZB2, VK2ERK, ZM0AJN, WB6NRK, WN6IWX Boatanchor and Antique Radio Collector __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] Recapping a DX-100
GM Bob, Congrats on scoring a nice DX-100. I don't know of any kits for recapping but there may be some. I've restored two over the past few months including the one I have on the air right now. I bought the HV caps from MOUSER electronics in Texas. Don't expect to replace the electrolytic cans with new ones. I used a couple of radial lead ones for the HV side. Just glued them to the existing wafers (after removing the old caps) and they look very nice and professional. The 20mfd and 40mfd can was left in place and new axial lead caps were used below the chassis. Same for the pair of 20mfd ones in the bias supply. There are those who will say that NOS (new old stock) caps, if re-formed, will work just fine. IMHO, do yourself a big favor and go with new, fresh electrolytics. Chokes and transformers for the old gal aren't cheap if one of the old ones decides to give up some smoke and ash. Tubes? Try ANTIQUE ELECTRONIC SUPPLY in Tempe, Arizona. As for modifications? I'd try the rig in stock condition first. Use a good, non-amplified D-104 or other crystal microphone and give it a try. Then, if select modifications are needed..your choice. While many of the mods will improve the overall performance of the rig, you suddenly won't have a DX-100 any more. And not all published mods work anyway. I've left mine stock, but did use one of the Harbach step-starts and did away with the two-fuse plug and line cord. Replaced with a 3-wire line cord and a single fuse in the hot side of the cord. I get good reports with it and it easily puts out 115 watts of carrier. Hope some of this helps.. Gud luck 73 de W4MIL Chuck -Original Message- From: Bob Bruno - K2KI [EMAIL PROTECTED] To: amradio@mailman.qth.net amradio@mailman.qth.net Sent: Sun, 9 Mar 2008 12:13 pm Subject: [AMRadio] Recapping a DX-100 Hi everybody, I recently had a DX-100 fall into my lap. Cosmetically it is immaculate inside. Outside needs a little soap water but there are no scratches or wear marks. AND... No hack jobs or extra holes drilled into it. It came to me with the enclosure too. My questions: 1 - Has anyone created a recap/mod kit for this? The radio needs a recap plus the mods that are posted on the Intraweb. :-) 2- Any good sourced for tubes? 3 - Are there any suggestions as to what the caps or other key components should be replaced with? (modern day equivalent) Thanks for reading this... 73, cul... Bob de k2ki __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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. __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] Ice Storm
Hi Dave, Ice is those clear, hard, chunky cold things that float in your glass whenever you order-up a cocktail at your favourite drinking establishent... Oh yes, it's also something that the Phoenix Coyotes skate on (I'll explain later), but on a much larger scale. It's sort of a Canadian thing, in a LOT of ways... I hope this helps! :) ~73~ Eddy VE3CUI - VE3XZ *** - Original Message - From: David Hollander [EMAIL PROTECTED] To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Sunday, March 09, 2008 11:27 AM Subject: Re: [AMRadio] Ice Storm What's Ice??? Dave N7RK Phoenix, Arizona -- *** Dave N7RK Boatanchors Home Page: http://members.cox.net/n7rk Phoenix, Arizona *DXCC Honor Roll**WAZ#22 - 75 Meter SSB* ex-XE2/N7RK, N7RK/ZB2, VK2ERK, ZM0AJN, WB6NRK, WN6IWX Boatanchor and Antique Radio Collector __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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. __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] beating ice off antenna
Back in my college days at WUVT FM, we had a 430 watt FM transmitter feeding a 2 bay horizonal polarized antenna. It was on the roof of the 7th floor of a dorm, and the transmitter would blow a screen supply fuse if the VSWR rose too high. So it was routine for the engineer on call (usually me at first, until I trained a few other hams and budding EE's) to go up there and beat on the mast with a 2 x 4 to clear the icing. The TX didn't make enough RF power to burn it off. Later, when I went to work for Broadcast Electronics and helped design the FM transmitter line in the 1980s, we developed VSWR-driven foldback of the screen power supply, a feature which, at that time, was unique in a broadcast rig. I remember a bunch of network OO's in Dallas had gotten hammered with icing, and their FM30s were tripping offline. Our foldback system was applied to the entire product line, you could just watch it reduce power, then it would ramp back up as the ice melted (either for RF or from the weather). I remember getting satisfied reports back from engineers in Texas and Lousiana after they got iced, but stayed on the air through it all. This feature became a standard for all big FM rigs after that, if they had a way to easily reduce power (like a variable screen power supply for a tetrode). Here I just grab the center coax up to my dipole, and pull it a couple of times, and the ice seems to drop off, if it isn't too thick. We don't get the kind of thick rind ice around wires and trees that hit more humid areas. 73 John K5PRO __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] Recapping a DX-100
Mike Sawyer wrote: Bob, Other than the mods you spoke of, I don't know of any better ones than those posted on the AM Window (http://www.amwindow.org/). If I were to replace one thing, it would be that wimpy driver transformer. AES (www.tubesandmore.com) has the Hammond equivalent for the Viking II and works just as nice on the DX-100. Also, they are a very good source for tubes but I would suspect you can find what you need at hamfests for a pittance of on-line prices. 1625's were made by the gross and are still found in pretty good supplies. BTW this is a question that should have been posed on the AM reflector instead of the AMSWAP list. Mod-U-Lator, Mike(y) W3SLK Mike, Can you elaborate on your comment regarding the driver transformer being wimpy. This is the first I've heard any comments regarding that part of the DX-100. 73, Tom K3TVC __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] Recapping a DX-100
- Original Message - From: Bob Bruno - K2KI [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Sunday, March 09, 2008 11:13 AM Subject: [AMRadio] Recapping a DX-100 Hi everybody, Hi Bob, I recently had a DX-100 fall into my lap. My questions: 1 - Has anyone created a recap/mod kit for this? The radio needs a recap plus the mods that are posted on the Intraweb. :-) 2- Any good sourced for tubes? Umm here are a couple of places I've used: A. RF parts - http://www.rfparts.com/tubetran.html the only downer - $25 minimum order B. Radio daze - http://www.radiodaze.com/ click on the components box, and scroll down to the vacuum tubes/valves line and click on that C. Antique Electronic Supply - http://www.tubesandmore.com/ click on the vacuum tubes line on the left. 3 - Are there any suggestions as to what the caps or other key components should be replaced with? (modern day equivalent) Many capacitor values may not be available anymore. But, typically by the 20% rule, you can get away with a value that's off by about 10 or 20% with no problems. Just make sure it has the same or better voltage rating, than the one you're replacing. You can try it with the original paper electrolytics in it, but more than likely, they're dried out/shot, and will need replacing. BTW, you'll be surpised just how much smaller than the originals, todays electrolytics are - as much as 50% smaller! As for the carbon comp resistors in your DX-100 - it depends upon how much they've been subjected to heat. They may still be good. If they are bad, in most cases, today's metal film resistors will be fine. Once again, they will look puny, compared to the old ones. Places I've used for components: Mouser Electronics - http://www.mouser.com/ Digikey - http://www.digikey.com/ Newark Electronics - http://www.newark.com/ Thanks for reading this... 73, cul... Bob de k2ki 73, Ellen - AF9J __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] Viking II advise
Thanks to all that responded to my question about the Viking II 122 vfo. I decided to pass on it and keep looking. I guess I could fire up the Drake twins but nobody (including me) likes the controlled carrier. It sure will pump the agc circuit in most receivers. Thanks again, Steve ab5mm __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] Ice Storm
Ahhh yes the reason I left Maine, Getting up in the morning to 30 below,Ice Ice and more Ice, Block heaters...More electricity to keep the block of the car warm...Splitting 5 cords of wood and then piling it in the garage and stoking the wood stove every AM...Man this 65 degrees in Dallas today is nice... Bob W1PE -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of EP Swynar Sent: Sunday, March 09, 2008 11:42 AM To: [EMAIL PROTECTED]; Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] Ice Storm Hi Dave, Ice is those clear, hard, chunky cold things that float in your glass whenever you order-up a cocktail at your favourite drinking establishent... Oh yes, it's also something that the Phoenix Coyotes skate on (I'll explain later), but on a much larger scale. It's sort of a Canadian thing, in a LOT of ways... I hope this helps! :) ~73~ Eddy VE3CUI - VE3XZ *** - Original Message - From: David Hollander [EMAIL PROTECTED] To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Sunday, March 09, 2008 11:27 AM Subject: Re: [AMRadio] Ice Storm What's Ice??? Dave N7RK Phoenix, Arizona -- *** Dave N7RK Boatanchors Home Page: http://members.cox.net/n7rk Phoenix, Arizona *DXCC Honor Roll**WAZ#22 - 75 Meter SSB* ex-XE2/N7RK, N7RK/ZB2, VK2ERK, ZM0AJN, WB6NRK, WN6IWX Boatanchor and Antique Radio Collector __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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. __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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. __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] Recapping a DX-100
K4TAX addressed this issue last year with sources for the various parts(with prices).If I can find it in my files, I will forward. I need to do that to my DX-100B(another project). Joe W4AAB - Original Message - From: Ellen Rugowski [EMAIL PROTECTED] To: [EMAIL PROTECTED]; Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Sunday, March 09, 2008 12:19 PM Subject: Re: [AMRadio] Recapping a DX-100 - Original Message - From: Bob Bruno - K2KI [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Sunday, March 09, 2008 11:13 AM Subject: [AMRadio] Recapping a DX-100 Hi everybody, Hi Bob, I recently had a DX-100 fall into my lap. My questions: 1 - Has anyone created a recap/mod kit for this? The radio needs a recap plus the mods that are posted on the Intraweb. :-) 2- Any good sourced for tubes? Umm here are a couple of places I've used: A. RF parts - http://www.rfparts.com/tubetran.html the only downer - $25 minimum order B. Radio daze - http://www.radiodaze.com/ click on the components box, and scroll down to the vacuum tubes/valves line and click on that C. Antique Electronic Supply - http://www.tubesandmore.com/ click on the vacuum tubes line on the left. 3 - Are there any suggestions as to what the caps or other key components should be replaced with? (modern day equivalent) Many capacitor values may not be available anymore. But, typically by the 20% rule, you can get away with a value that's off by about 10 or 20% with no problems. Just make sure it has the same or better voltage rating, than the one you're replacing. You can try it with the original paper electrolytics in it, but more than likely, they're dried out/shot, and will need replacing. BTW, you'll be surpised just how much smaller than the originals, todays electrolytics are - as much as 50% smaller! As for the carbon comp resistors in your DX-100 - it depends upon how much they've been subjected to heat. They may still be good. If they are bad, in most cases, today's metal film resistors will be fine. Once again, they will look puny, compared to the old ones. Places I've used for components: Mouser Electronics - http://www.mouser.com/ Digikey - http://www.digikey.com/ Newark Electronics - http://www.newark.com/ Thanks for reading this... 73, cul... Bob de k2ki 73, Ellen - AF9J __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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. __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] Ice Storm
Looks like its heading our way in the UK during the next few days, better tie down the ol' 5 ele. hihi, hope there is not too much ice but it is certainly going to be windy and wet. 80mph gusts etc. I'll have to fire up the BC-610E and keep warm!! 73 Max M0GHQ __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] Recapping a DX-100
Yep, That little driver xformer on the bottom of the chassis, is about 1 X 1. It is usually the bain of the audio section in the DX-100. I had one short to ground and I ended up scratching my head until I did a systematic removal of items from the LVPS. If you don't use negative feedback then you can just replace the transformer. But if you decide to do resistive coupling to the grids of the 1625's then you can eliminate the transformer altogether. Like I said, its the weak spot in the DX-100 audio chain. Mod-U-Lator, Mike(y) W3SLK - Original Message - Mike, Can you elaborate on your comment regarding the driver transformer being wimpy. This is the first I've heard any comments regarding that part of the DX-100. 73, Tom K3TVC __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] DX 100 driver transformer
What is the Hammond/Antique Radio number/description for the audio driver transformer for the DX 100 transmitter, if you have access to it? Is the DX 100 audio driver transformer the same number and model as the one for the Viking II? I have read that the audio driver transformer is the weak link in the Viking II and doesn't supply sufficient drive for the modulators. Your comments and information will be appreciated. Thanks and 73, John, K5PGW Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] New Swap List going GOOD!
I signed up for the new swap list a couple days ago but have not received anything yet Thoughts? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of A.R.S. - WA5AM Sent: March 5, 2008 3:43 PM To: Discussion of AM Radio in the Amateur Service Subject: [AMRadio] New Swap List going GOOD! FYI on new swap list. Great turnout on the subscriptions for the new AMSwap list! Just since this morning we have close to 100 members on there. Already had one for sale post, and within an hour all was sold. Oh, and the REPLY button does goes to the sender as intended ;) -- Money is only temporary, radios are forever - Jim Little aka the old dawg/K5BAI __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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. __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] New Swap List going GOOD!
Whops, did get one but missed it. Sorry all. -Original Message- From: brian crawford [mailto:[EMAIL PROTECTED] Sent: March 9, 2008 2:29 PM To: 'Discussion of AM Radio in the Amateur Service' Subject: RE: [AMRadio] New Swap List going GOOD! I signed up for the new swap list a couple days ago but have not received anything yet Thoughts? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of A.R.S. - WA5AM Sent: March 5, 2008 3:43 PM To: Discussion of AM Radio in the Amateur Service Subject: [AMRadio] New Swap List going GOOD! FYI on new swap list. Great turnout on the subscriptions for the new AMSwap list! Just since this morning we have close to 100 members on there. Already had one for sale post, and within an hour all was sold. Oh, and the REPLY button does goes to the sender as intended ;) -- Money is only temporary, radios are forever - Jim Little aka the old dawg/K5BAI __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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. __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] New Swap List going GOOD!
I will be putting a lot of NOS tubes on the new reflector in a couple of days. Thanks. Ed K6UUZ On Sun, 09 Mar 2008 14:28:46 -0700 brian crawford [EMAIL PROTECTED] writes: I signed up for the new swap list a couple days ago but have not received anything yet Thoughts? -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of A.R.S. - WA5AM Sent: March 5, 2008 3:43 PM To: Discussion of AM Radio in the Amateur Service Subject: [AMRadio] New Swap List going GOOD! FYI on new swap list. Great turnout on the subscriptions for the new AMSwap list! Just since this morning we have close to 100 members on there. Already had one for sale post, and within an hour all was sold. Oh, and the REPLY button does goes to the sender as intended ;) -- Money is only temporary, radios are forever - Jim Little aka the old dawg/K5BAI __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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. __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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. __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] DX 100 driver transformer
If memory serves me John its P-T124E. This is also used in the Ranger as well. It is a good well rounded drop in replacement. Mod-U-Lator, Mike(y) W3SLK - Original Message - From: John King [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Sunday, March 09, 2008 5:16 PM Subject: [AMRadio] DX 100 driver transformer What is the Hammond/Antique Radio number/description for the audio driver transformer for the DX 100 transmitter, if you have access to it? Is the DX 100 audio driver transformer the same number and model as the one for the Viking II? I have read that the audio driver transformer is the weak link in the Viking II and doesn't supply sufficient drive for the modulators. Your comments and information will be appreciated. Thanks and 73, John, K5PGW __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] DX 100 driver transformer
I have a few of these driver transformers kicking around. Original Heathkits. Email me direct. Regards, Gary - Original Message - From: John King [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Sunday, March 09, 2008 5:16 PM Subject: [AMRadio] DX 100 driver transformer What is the Hammond/Antique Radio number/description for the audio driver transformer for the DX 100 transmitter, if you have access to it? Is the DX 100 audio driver transformer the same number and model as the one for the Viking II? I have read that the audio driver transformer is the weak link in the Viking II and doesn't supply sufficient drive for the modulators. Your comments and information will be appreciated. Thanks and 73, John, K5PGW Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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. __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] Recapping a DX-100
I rcapped mine about 4 years ago; everything is easily obtained from Mouser. Read the upgrades on the AM Window; and use the updated cap specifications for the power supply and audio section. 73 Mark K3MSB __ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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] RE: Why do some people capitalise ham?
I kind of feel the same, I've gotten CB comments before when I've told people I'm a ham, Amateur Radio Operator sounds a little more dignified and actually explains the hobby much more clearly to non-radio people, Bob KB1OKL Personal I prefer that the use of ham, be kept within our ranks. When telling some about our hobby I like to use Amateur Radio Operator. Dave W9WRL _ Climb to the top of the charts! Play the word scramble challenge with star power. http://club.live.com/star_shuffle.aspx?icid=starshuffle_wlmailtextlink_jan__ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio 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.
