[AMRadio] Fraud on E-bay
Greetings fellow listers, Jim WB2FCN here. To advise you folks that the E-pay site, has an HT-32 transmitter listed by seller hamstuff4u. This is a bogus listing, as 1st, the pictures are of MY HT-32A, which is currently sitting in my storage unit. This seller has lifted my description from my web pages along with the pictures and is offering the unit for sale for a Buy-It-Now price of $210.00. I will make an attempt to have E-bay remove this listing. Item number is 270023123317 . Beware of frauds. Jim WB2FCN http://eshop1.chem.buffalo.edu __ AMRadio mailing list 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
Re: [AMRadio] Fraud on E-bay
Now that guy has got a set of brass ones. I say we hunt him down and wire him up to a heavy duty plate transformer and let Jim throw the switch! That bogus listing just underscores the fact that anyone who hides his feedback comments is not worthy of your business. Honest hams have nothing to hide! Barry, KF5GC __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com __ AMRadio mailing list 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
Re: [AMRadio] Fraud on E-bay
I can supply the plate transformer [Original Message] From: Barry Sherwood [EMAIL PROTECTED] To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Date: 8/31/2006 8:28:05 AM Subject: Re: [AMRadio] Fraud on E-bay Now that guy has got a set of brass ones. I say we hunt him down and wire him up to a heavy duty plate transformer and let Jim throw the switch! That bogus listing just underscores the fact that anyone who hides his feedback comments is not worthy of your business. Honest hams have nothing to hide! Barry, KF5GC __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com __ AMRadio mailing list 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 __ AMRadio mailing list 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
Re: [AMRadio] Fraud on E-bay
Jim, There is an interesting disclaimer at the bottom of the auction: NOTE: Pictures shown are reproduced from the Motorla web site, and not of the actual item I never knew Motorola made an HT-32! :-) Regards, Jim JKO __ AMRadio mailing list 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
Re: [AMRadio] Fraud on E-bay
Just my opinion but, this is probably more laziness and stupidity than fraud. $200+ is just not enough moola to attract the fraudsters. They will go for high 3 figures or low 4-figures all the time. I've been at the wrong end of 4 frauds so I am something of an expert. All were in the music or camera equipment area. I made the mistake of paying by money order the first time and lost my money. The post office did nothing even though I went through all their bureaucracy, worked with the local police as they recommended, etc. Lesson learned: Money orers protect the seller, not the buyer. The other 3 times were all by PayPal. In all 3 cases PayPal recovered my money. Two of them were for purchases just over $100 for which the seller just never sent the item. One seller even had the nerve to complain to me afterward about the bad feedback I left! The third one surprised me. I tried to buy a $2K plus audio mixer on eBay and PayPal would not let me send the money to the seller. They said the seller already had fraud claims against them. I researched the seller (because it was quite a bargain--in retrospect probably too good to be true) and sure enough, e-mails bounced and phone calls went nowhere. I was on my knees thanking PayPal over tha one. This guy just looks like someone who doesn't know what he is doing and is trying to remain anonymous. Just an idiot, probably not a fraudster, IMHO. He probably found the pic in a google search and that saved him from having to take one. 73, Don Merz, N3RHT --- Jim Candela [EMAIL PROTECTED] wrote: Jim, There is an interesting disclaimer at the bottom of the auction: NOTE: Pictures shown are reproduced from the Motorla web site, and not of the actual item I never knew Motorola made an HT-32! :-) Regards, Jim JKO __ AMRadio mailing list 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 __ AMRadio mailing list 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
[AMRadio] Amfone.net AM Forum hacked!
I'm sure many of you already know, but some Turkish hackers have hacked the AM Forum site. Don't know when it will be restored, but I'm sure Gary, W2INR is working on it. Ed, VA3ES __ AMRadio mailing list 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
Re: [AMRadio] Amfone.net AM Forum hacked!
Looks like they got just the forum and not the main screen. Damn, why couldn't they have got the Inquirer? Mod-U-Lator, Mike(y) W3SLK - Original Message - From: Ed Sieb [EMAIL PROTECTED] To: Amradio amradio@mailman.qth.net Sent: Thursday, August 31, 2006 10:44 AM Subject: [AMRadio] Amfone.net AM Forum hacked! I'm sure many of you already know, but some Turkish hackers have hacked the AM Forum site. Don't know when it will be restored, but I'm sure Gary, W2INR is working on it. Ed, VA3ES __ AMRadio mailing list 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 __ AMRadio mailing list 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
[AMRadio] Re: Amfone.net AM Forum hacked!
Yeah, I saw it. I sent Gary some little bit of info I found about the hack that might prevent it in the future. Amazes me what it takes for some people to get a high, not to mention the time they have on their hands. Jerks! On 8/31/06, Ed Sieb [EMAIL PROTECTED] wrote: I'm sure many of you already know, but some Turkish hackers have hacked the AM Forum site. Don't know when it will be restored, but I'm sure Gary, W2INR is working on it. Ed, VA3ES __ AMRadio mailing list 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 -- There is nothing more uncommon than common sense. -- Frank Lloyd Wright __ AMRadio mailing list 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
Re: [AMRadio] Fraud on E-bay
Is the seller the old Radio Mart guy? Seems as if I read somewhere it may be, or this guy has some similar traits. 73 Jim W5JO Jim WB2FCN here. To advise you folks that the E-pay site, has an HT-32 transmitter listed by seller hamstuff4u. This is a bogus listing, as 1st, the pictures are of MY HT-32A, which is currently sitting in my storage unit. This seller has lifted my description from my web pages along with the pictures and is offering the unit for sale for a Buy-It-Now price of $210.00. I will make an attempt to have E-bay remove this listing. Item number is 270023123317 . Beware of frauds. __ AMRadio mailing list 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
Re: [AMRadio] Amfone.net AM Forum hacked!
Hopefully it's well backed-up, because there is a lot of valuable stuff in there. Bacon, WA3WDR __ AMRadio mailing list 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
[AMRadio] Re: Fraud
He has had 4 Ebay IDs since Jan. 06. Steve WA2TAK __ AMRadio mailing list 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
[AMRadio] Re: Amfone.net AM Forum hacked!
Anyone have Gary's phone # where I can reach him now? I've lost them. Please send to me direct. [EMAIL PROTECTED] On 8/31/06, Bob Bruhns [EMAIL PROTECTED] wrote: Hopefully it's well backed-up, because there is a lot of valuable stuff in there. Bacon, WA3WDR __ AMRadio mailing list 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 -- There is nothing more uncommon than common sense. -- Frank Lloyd Wright __ AMRadio mailing list 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
Re: [AMRadio] Re: Fraud
There seem to be more and more of these people coming out of the woodwork, trying ot prey on unsuspecting Amateur Radio operators. They seem to think if they offer a unit associated with Ham Radio and suggest they too are in the hobby it will make people trust them more. Maybe this guy is just lazy or maybe he is a crook. Either way, I have a hard time putting my confidence in someone who hides their feedback. It's not the dollar amount, I hate to be taken for even a penny by a crook. It pays to be aware, not to judge too quickly, but be cautious. Rick/K5IZ __ AMRadio mailing list 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
Re: [AMRadio] Re: Fraud
I turned a guy in the other day to QTH for using a call I knew was inactive. The guy gave his name and telephone number but it didn't match the call, who was last active on VHF in the 1960's.QTH kicked him off.If the guy had just used his name, with a phone number and said NONE for a call, I could live with that. But to use a call that is inactive is stupid. I DO research things before I buy from anybody.I think it is society in general that puts up with this kind of stuff. We amateurs have to hold ourselves to a higher standard. Joe W4AAB - Original Message - From: Rick Brashear [EMAIL PROTECTED] To: Discussion of AM Radio in the Amateur Service amradio@mailman.qth.net Sent: Thursday, August 31, 2006 10:58 AM Subject: Re: [AMRadio] Re: Fraud There seem to be more and more of these people coming out of the woodwork, trying ot prey on unsuspecting Amateur Radio operators. They seem to think if they offer a unit associated with Ham Radio and suggest they too are in the hobby it will make people trust them more. Maybe this guy is just lazy or maybe he is a crook. Either way, I have a hard time putting my confidence in someone who hides their feedback. It's not the dollar amount, I hate to be taken for even a penny by a crook. It pays to be aware, not to judge too quickly, but be cautious. Rick/K5IZ __ AMRadio mailing list 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 __ AMRadio mailing list 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
Re: [AMRadio] Fraud on E-bay
His address is listed in another post if you want to visit him. 4313 Manton Ln. Holiday, Fl 34690 Pete, wa2cwa Jim WB2FCN here. To advise you folks that the E-pay site, has an HT-32 transmitter listed by seller hamstuff4u. This is a bogus listing, as 1st, the pictures are of MY HT-32A, which is currently sitting in my storage unit. This seller has lifted my description from my web pages along with the pictures and is offering the unit for sale for a Buy-It-Now price of $210.00. I will make an attempt to have E-bay remove this listing. Item number is 270023123317 . Beware of frauds. __ AMRadio mailing list 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
[AMRadio] crystals for broadcast transmitter
Where can I get a good crystal for 3870 for a RCA broadcast transmitter? Brad KB7FQR __ AMRadio mailing list 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
Re: [AMRadio] crystals for broadcast transmitter
Do they go in ovens? I think Brian Carling has some that will work and also Petersen's. Rick uvcm inc. wrote: Where can I get a good crystal for 3870 for a RCA broadcast transmitter? Brad KB7FQR __ AMRadio mailing list 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
RE: [AMRadio] crystals for broadcast transmitter
Yes but I have the ovens off. Do they go in ovens? I think Brian Carling has some that will work and also Petersen's. Rick uvcm inc. wrote: Where can I get a good crystal for 3870 for a RCA broadcast transmitter? Brad KB7FQR __ AMRadio mailing list 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
Re: [AMRadio] crystals for broadcast transmitter
I'm not good with crystal case sizes, but the crystals in my 1R2 are inside the ovens. Brian will know. Rick uvcm inc. wrote: Yes but I have the ovens off. __ AMRadio mailing list 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
Re: [AMRadio] crystals for broadcast transmitter
On Thu, 31 Aug 2006, uvcm inc. wrote: Where can I get a good crystal for 3870 for a RCA broadcast transmitter? Not enough info: What is the RCA model number of the oven/holder? Also - an 807 is the oscillator, IIRC. And Brian Carling (on this list) sells crystals, but they'd most likely need to be modified to fit in the existing fixture. Perhpas someone who has modded a classis RCA rock-holder can give better info... Cheers John KB6SCO __ AMRadio mailing list 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
RE: [AMRadio] crystals for broadcast transmitter
Unless I'm completely mistaken I believe that the crystal inside the holder (a large octal based oven) is an HC6/u type. One can plug in FT-243 type xtals in the oven sockets, or use modern style HC6/u with fat pins. Ed, VA3ES -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of John Lawson Sent: Thursday, August 31, 2006 3:59 PM To: Discussion of AM Radio in the Amateur Service Subject: Re: [AMRadio] crystals for broadcast transmitter On Thu, 31 Aug 2006, uvcm inc. wrote: Where can I get a good crystal for 3870 for a RCA broadcast transmitter? Not enough info: What is the RCA model number of the oven/holder? Also - an 807 is the oscillator, IIRC. And Brian Carling (on this list) sells crystals, but they'd most likely need to be modified to fit in the existing fixture. Perhpas someone who has modded a classis RCA rock-holder can give better info... Cheers John KB6SCO __ AMRadio mailing list 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
[AMRadio] Solder
Where can I find Ersin MultiCore solder? I have searched far and wide, but nothing in the USA. Most of the big suppliers carry Kester. Anyone know of a source? Thanks, Rick/K5IZ __ AMRadio mailing list 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
[AMRadio] Microphone assistance
Can anyone assist me in converting a low impedence microphone to high impendence. I bought several 600 ohm studio microphones (plastic housing) that come with a 9 foot cable and microphone plug. I am interested in using the microphone with a high impedence input transmitter on AM. Any suggestions? Perhaps, I should use a mixer unit that has low impedence input with a high impedence output. Thank you Dave, W3ST Publisher of the Collins Journal Secretary to the Collins Radio Association www.collinsra.com - the CRA Website Now with PayPal CRA Nets: 3805 Khz every Monday at 8 PM EST and 14255 every Saturday at 12 Noon EST __ AMRadio mailing list 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
[AMRadio] Bogus calls?
Here's one for ya...way back when...I was listening on CWI hear CQ, CQ etc...de WA2TAK..dahdidahdit.so I reply WA2TAK de WA2TAKgot no reply! Steve WA2TAK ( I think hihi) __ AMRadio mailing list 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
Re: [AMRadio] Microphone assistance
You can use the mixer as stated or use a microphone transformer to go from low to high or make a simple 1 transistor amp with a NPN or PNP and it should work. Healthfully yours, Don W4BWS - Original Message - From: david knepper [EMAIL PROTECTED] To: amradio@mailman.qth.net; [EMAIL PROTECTED] Sent: Thursday, August 31, 2006 3:29 PM Subject: [AMRadio] Microphone assistance Can anyone assist me in converting a low impedence microphone to high impendence. I bought several 600 ohm studio microphones (plastic housing) that come with a 9 foot cable and microphone plug. I am interested in using the microphone with a high impedence input transmitter on AM. Any suggestions? Perhaps, I should use a mixer unit that has low impedence input with a high impedence output. Thank you Dave, W3ST Publisher of the Collins Journal Secretary to the Collins Radio Association www.collinsra.com - the CRA Website Now with PayPal CRA Nets: 3805 Khz every Monday at 8 PM EST and 14255 every Saturday at 12 Noon EST __ AMRadio mailing list 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 __ AMRadio mailing list 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
Re: [AMRadio] Bogus calls?
On 8/31/06, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Here's one for ya...way back when...I was listening on CWI hear CQ, CQ etc...de WA2TAK..dahdidahdit.so I reply WA2TAK de WA2TAKgot no reply! I've received QSL cards for contacts I supposedly made on dates and times that I was nowhere near a radio and hadn't been active for some time. Didn't even have an aerial up! Thankfully, no rare DX or points needed for corntesting... ~ Todd KA1KAQ __ AMRadio mailing list 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
RE: [AMRadio] Solder
According to my sources, Ersin Multicore was bought out by LOCTITE Corp. http://www.loctite.us/int_henkel/loctite_us/index.cfm?pageid=90layout=2 Good luck, Ed, VA3ES -- Where can I find Ersin MultiCore solder? I have searched far and wide, but nothing in the USA. Most of the big suppliers carry Kester. Anyone know of a source? Thanks, Rick/K5IZ __ AMRadio mailing list 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 __ AMRadio mailing list 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
Re: [AMRadio] Microphone assistance
On 8/31/06, david knepper [EMAIL PROTECTED] wrote: Can anyone assist me in converting a low impedence microphone to high impendence. I bought several 600 ohm studio microphones (plastic housing) that come with a 9 foot cable and microphone plug. I am interested in using the microphone with a high impedence input transmitter on AM. Any suggestions? Perhaps, I should use a mixer unit that has low impedence input with a high impedence output. Nah, just rip out the innards and stuff one of them thar Heil elements inside. Guaranteed to improve yer monkey swing... :D ~ Todd, KA1KAQ __ AMRadio mailing list 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
[AMRadio] RE: Amfone.net AM Forum hacked!
AM Forum is back up and running! __ AMRadio mailing list 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
Re: [AMRadio] Microphone assistance
The easiest way is to buy a transformer from some place like Guitar Center that does that very thing. You can usually find them in a variety of plug configurations nd they allow you to go from Hi Z to Lo Z or visa versa. Heil also sells a small transformer that will probably fit inside your mic that will do the same. Rick david knepper wrote: Can anyone assist me in converting a low impedence microphone to high impendence. I bought several 600 ohm studio microphones... __ AMRadio mailing list 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
Re: [AMRadio] Solder
Yeah, it's almost all Kester (works good) and SPC (I think I have some, OK) out there. I looked at Digi-Key, Mouser, Allied, and finally I found Ersin Multicore at Newark. http://www.newark.com/ BAcon, WA3WDR __ AMRadio mailing list 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
Re: [AMRadio] Solder
And it's not Ersin any more, it jyust says Multicore. -Bacon, WA3WDR __ AMRadio mailing list 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
RE: [AMRadio] Microphone assistance
The trouble with low z microphones is that some times the output of the mic is too low and you don't have enough gain to get the modulation up high enough. If you do have enough gain then they work just fine in the hi-z input circuit. Beware that some input circuits do not have, or use, a coupling capacitor and the grid sets high above ground at 2.2 Meg or more, and develops contact bias. (no cathode bias resistor) The circuit works well with a ceramic or crystal microphone which has no continuity to ground but put a microphone which has continuity to ground such as a dynamic, even if it has a matching transformer, and it will kill the bias on the preamp causing the stage to operate in a distorted manner. If you don't want to go into the rig and modify the input circuit with a coupling cap then put one in the microphone to block the bias drain. The dynamic microphone will have a responds curve which extends much lower that the Xtal or ceramic so to balance it out you may want to do some extending of the high frequency range as well. You may also reduce the size of the coupling capacitor that you use at the input to limit the low frequency to a more expectable response for the rig. John WA5BXO __ AMRadio mailing list 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
Re: [AMRadio] Microphone assistance
The trouble with low z microphones is that some times Once a Hi-Z mike sends it's signal out it needs a short low capacity cable to keep from effectively shorting the highs. Putting a transformer in the mike is ok as long as the cord is low capacity and short. The 9 foot cord sounds like a disaster waiting to happen. The reason, I thought, for the LowZ mics was so a long cable, 20, 30 40 50 feet would not suffer such troubles. The idea of a mixer and then the Z conversion sounds good.. Just another $0.02.. Mike __ AMRadio mailing list 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
RE: [AMRadio] Microphone assistance
You are correct Mike, One way to help with the cable capacitance trouble, if a XFMR is to be used to step up the voltage, is to put the XRMR close the input circuit or preferably in the speech amp chassis and incorporate a 3 pin XLR connector. Run balanced low Z from the microphone to the XLR input and using the shield of the cable for just a shield and not common the audio of the microphone. The mixer is a good plan if available and may have other uses. Mine also has compression using a Light Dependent Resistance device to regulate the audio level. John WA5BXO __ AMRadio mailing list 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
Re: [AMRadio] Solder
Thanks! I'll give them a call. Hey Dave... did you get this message? Rick Bob Bruhns wrote: Yeah, it's almost all Kester __ AMRadio mailing list 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
Re: [AMRadio] Microphone assistance
I read that a low-Z mic has a low source Z, but it wants to see a high load Z. The trick with a preamp is to present a high Z to the mike, but produce minmum noise with a low-Z source. But that's for perfectionists. A transformer will work fine. Capacitive loading at the hi-Z side will affect highs, even a few feet of coax is enough to be noticeable. So the transformer should be fairly close to the radio. Since the transformer inductance and the RF filrtering and cable capacitance will be shunting the mic, some resistive loading (10K, more or less) on the high-Z side might help the frequency response, at the expense of level. About two feet of shielded cable would allow the audio transformer to be a little bit removed from the power transformers, and might help keep hum out of it. I think Radio Shack carries audio transformers of this type. Bacon, WA3WDR __ AMRadio mailing list 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
RE: [AMRadio] Microphone assistance
Dave and all...Heil has a mini transformer that sometimes you can put in the mike I have a turner studio mike with a Heil built in works great...But as others have told You Guitar Center is a great source or Musicians Friend on line... I have an old Shure Transformer Brand new but would not sell for $10...Radio Shack has an XLR Input cable connector Bob W1PE -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of david knepper Sent: Thursday, August 31, 2006 3:29 PM To: amradio@mailman.qth.net; [EMAIL PROTECTED] Subject: [AMRadio] Microphone assistance Can anyone assist me in converting a low impedence microphone to high impendence. I bought several 600 ohm studio microphones (plastic housing) that come with a 9 foot cable and microphone plug. I am interested in using the microphone with a high impedence input transmitter on AM. Any suggestions? Perhaps, I should use a mixer unit that has low impedence input with a high impedence output. Thank you Dave, W3ST Publisher of the Collins Journal Secretary to the Collins Radio Association www.collinsra.com - the CRA Website Now with PayPal CRA Nets: 3805 Khz every Monday at 8 PM EST and 14255 every Saturday at 12 Noon EST __ AMRadio mailing list 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 __ AMRadio mailing list 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
RE: [AMRadio] Microphone assistance
- Message: 1 Date: Thu, 31 Aug 2006 16:29:10 -0400 From: david knepper [EMAIL PROTECTED] Subject: [AMRadio] Microphone assistance To: amradio@mailman.qth.net, [EMAIL PROTECTED] Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; format=flowed; charset=iso-8859-1; reply-type=original Can anyone assist me in converting a low impedence microphone to high impendence. I bought several 600 ohm studio microphones (plastic housing) that come with a 9 foot cable and microphone plug. I am interested in using the microphone with a high impedence input transmitter on AM. Any suggestions? Perhaps, I should use a mixer unit that has low impedence input with a high impedence output. Thank you Dave, W3ST Publisher of the Collins Journal Secretary to the Collins Radio Association www.collinsra.com - the CRA Website Now with PayPal CRA Nets: 3805 Khz every Monday at 8 PM EST and 14255 every Saturday at 12 Noon EST Dave You need to properly match the low impedance broadcast microphone to you Hi Z rig input using a matching transformer. The solution that I have used here is a Heil Sound transformer that I picked up at the local ham store for $15. It has a 600 Ohm winding and a 30K Ohm winding, is small in size and is rated a microphone rather than line levels. My low Z sources work great into the S-Line using the transformer built up in a small diecast box with connectors. I have one version for microphone level input and another with a 60db pad in front of the transformer so that I can feed the rig with the broadcast audio chain Check Bob's web site and you will find the transformer listed under his microphone accessories. I run a Harris broadcast audio console and professional processing here and have also used the transformers to match HI Z microphones into the microphone inputs on the console. All the best Jay K8CJY __ AMRadio mailing list 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
Re: [AMRadio] Microphone assistance
The response was overwhelming. Thank you all. Dave, W3ST Publisher of the Collins Journal Secretary to the Collins Radio Association www.collinsra.com - the CRA Website Now with PayPal CRA Nets: 3805 Khz every Monday at 8 PM EST and 14255 every Saturday at 12 Noon EST - Original Message - From: Jay Adrick [EMAIL PROTECTED] To: amradio@mailman.qth.net Sent: Thursday, August 31, 2006 7:46 PM Subject: RE: [AMRadio] Microphone assistance - Message: 1 Date: Thu, 31 Aug 2006 16:29:10 -0400 From: david knepper [EMAIL PROTECTED] Subject: [AMRadio] Microphone assistance To: amradio@mailman.qth.net, [EMAIL PROTECTED] Message-ID: [EMAIL PROTECTED] Content-Type: text/plain; format=flowed; charset=iso-8859-1; reply-type=original Can anyone assist me in converting a low impedence microphone to high impendence. I bought several 600 ohm studio microphones (plastic housing) that come with a 9 foot cable and microphone plug. I am interested in using the microphone with a high impedence input transmitter on AM. Any suggestions? Perhaps, I should use a mixer unit that has low impedence input with a high impedence output. Thank you Dave, W3ST Publisher of the Collins Journal Secretary to the Collins Radio Association www.collinsra.com - the CRA Website Now with PayPal CRA Nets: 3805 Khz every Monday at 8 PM EST and 14255 every Saturday at 12 Noon EST Dave You need to properly match the low impedance broadcast microphone to you Hi Z rig input using a matching transformer. The solution that I have used here is a Heil Sound transformer that I picked up at the local ham store for $15. It has a 600 Ohm winding and a 30K Ohm winding, is small in size and is rated a microphone rather than line levels. My low Z sources work great into the S-Line using the transformer built up in a small diecast box with connectors. I have one version for microphone level input and another with a 60db pad in front of the transformer so that I can feed the rig with the broadcast audio chain Check Bob's web site and you will find the transformer listed under his microphone accessories. I run a Harris broadcast audio console and professional processing here and have also used the transformers to match HI Z microphones into the microphone inputs on the console. All the best Jay K8CJY __ AMRadio mailing list 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 __ AMRadio mailing list 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
Re: [AMRadio] Microphone assistance
There are transformers made into a mic plug. - Original Message - From: david knepper [EMAIL PROTECTED] To: amradio@mailman.qth.net; [EMAIL PROTECTED] Sent: Thursday, August 31, 2006 3:29 PM Subject: [AMRadio] Microphone assistance Can anyone assist me in converting a low impedence microphone to high impendence. I bought several 600 ohm studio microphones (plastic housing) that come with a 9 foot cable and microphone plug. I am interested in using the microphone with a high impedence input transmitter on AM. Any suggestions? Perhaps, I should use a mixer unit that has low impedence input with a high impedence output. Thank you Dave, W3ST Publisher of the Collins Journal Secretary to the Collins Radio Association www.collinsra.com - the CRA Website Now with PayPal CRA Nets: 3805 Khz every Monday at 8 PM EST and 14255 every Saturday at 12 Noon EST __ AMRadio mailing list 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 __ AMRadio mailing list 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
[AMRadio] Heil Model EQ-300
I have a brand new EQ-300. No manual, however. Can anyone tell me their experience with this older unit, specifically, how it performs on AM. I assume that it is for high impedence microphones and high impedence output. Thank you. Dave, W3ST Publisher of the Collins Journal Secretary to the Collins Radio Association www.collinsra.com - the CRA Website Now with PayPal CRA Nets: 3805 Khz every Monday at 8 PM EST and 14255 every Saturday at 12 Noon EST __ AMRadio mailing list 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
Re: [AMRadio] Microphone assistance
. I was thinking of a transformer in the microphone case and the 9 foot cord which goes against my grain. I know we can make any of them work. When I hear AM radio guys talk about HighZ I think of a D-104 and it's ilk at about 5 megohms, this is high Z! When I hear 30K ohms I am thinking of a Hi-Z SSB like Kenwood TS520s,Drakes and Collins. That is what they call high Z. Most broadcast mics, I think are about 50 ohms ( dynamic types). I notice that a Shure 515SB is rated at 150 ohms, actual is 170 ohms and is for use on 19 to 300 ohm inputs..I too like the mixer plan.. 73.. Mike - Original Message - From: John E. Coleman (ARS WA5BXO) [EMAIL PROTECTED] To: 'Mike Dorworth, K4XM' [EMAIL PROTECTED]; 'Discussion of AM Radio in the Amateur Service' amradio@mailman.qth.net Sent: Thursday, August 31, 2006 5:40 PM Subject: RE: [AMRadio] Microphone assistance You are correct Mike, One way to help with the cable capacitance trouble, if a XFMR is to be used to step up the voltage, is to put the XRMR close the input circuit or preferably in the speech amp chassis and incorporate a 3 pin XLR connector. Run balanced low Z from the microphone to the XLR input and using the shield of the cable for just a shield and not common the audio of the microphone. The mixer is a good plan if available and may have other uses. __ AMRadio mailing list 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
Re: [AMRadio] crystals for broadcast transmitter
Can someone tell us what kind of holder/case are needed for the crystals used in these BC rigs? On Thu, 31 Aug 2006, uvcm inc. wrote: Where can I get a good crystal for 3870 for a RCA broadcast transmitter? Not enough info: What is the RCA model number of the oven/holder? Also - an 807 is the oscillator, IIRC. And Brian Carling (on this list) sells crystals, but they'd most likely need to be modified to fit in the existing fixture. Perhpas someone who has modded a classis RCA rock-holder can give better info... Cheers John KB6SCO __ AMRadio mailing list 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 __ AMRadio mailing list 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
RE: [AMRadio] crystals for broadcast transmitter
From: Ed Sieb [EMAIL PROTECTED] Unless I'm completely mistaken I believe that the crystal inside the holder (a large octal based oven) is an HC6/u type. One can plug in FT-243 type xtals in the oven sockets, or use modern style HC6/u with fat pins. Ed, VA3ES Thanks Ed - I can supply 3870 kHz crystals (and others) in either one of those two cases - HC6U or FT-243. Just specify what you need rather than a transmitter model. I don't keep a roster of the old broadcast rigs so as to know what crystal case is required! The following AM frequencies are readily available: FT243: 3800, 3805, 3810, 3816.8, 3825, 3830, 3837, 3840 kHz 3855, 3865, 3870, 3875, 3880, 3885, 3890, 3900 kHz 3912.5, 3915, 3930, 3935, 3940, 3948, 3983, 3993, 3996.3 kHz. Many of these are also available as HC6U types. E-mail me off the list for details. 73 - Brian, AF4K.com __ AMRadio mailing list 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
RE: [AMRadio] crystals for broadcast transmitter
In the RCA rigs, it's a large oven on an octal base. The xtals used internally are HC6/u type. Ed, VA3ES Brian Carling asked: Can someone tell us what kind of holder/case are needed for the crystals used in these BC rigs? __ AMRadio mailing list 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
[AMRadio] Fw: Heil Model EQ-300
Subject: Heil Model EQ-300 I have a brand new EQ-300. No manual, however. Can anyone tell me their experience with this older unit, specifically, how it performs on AM. I assume that it is for high impedence microphones and high impedence output. Thank you. Dave, W3ST Publisher of the Collins Journal Secretary to the Collins Radio Association www.collinsra.com - the CRA Website Now with PayPal CRA Nets: 3805 Khz every Monday at 8 PM EST and 14255 every Saturday at 12 Noon EST __ AMRadio mailing list 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
