Re: [AMRadio] Going to start parting out an Apache
I have 2 Apaches and neither has a cracked drum. Care and envoironment seem to be the culperts. 73, John, W4AWM --- StripMime Report -- processed MIME parts --- multipart/alternative text/plain (text body -- kept) text/html The reason this message is shown is because the post was in HTML or had an attachment. Attachments are not allowed. Please post in Plain-Text only.---
Re: [AMRadio] Going to start parting out an Apache
Hey Bob, hows you doing? I have a DX100 thats taken up a bad habbit something is smoking under the chassis. I don't know what yet, so may need a part from that part out. Hopefully you have not sold all the parts yet? I will get back to you - thanks Russ. From: [EMAIL PROTECTED] Reply-To: amradio@mailman.qth.net To: AM Radio Subject: [AMRadio] Going to start parting out an Apache Date: Wed, 21 Aug 2002 16:00:03 -0400 Folks, I have an unrestored Heathkit TX-1 Apache. Going to start removing the transformers and parting it out. No reasonable takers to date, thinning out the "herd" so to speak. I understand many are the same as used in the DX-100. Bob - N0DGN Craf-T-Bob (Because I love Hallicrafters!) R-390A EAC '67, R-390A Collins '52, BC-610I, BC-939B, and BC-614E ___ AMRadio mailing list AMRadio@mailman.qth.net http://mailman.qth.net/mailman/listinfo/amradio _ MSN Photos is the easiest way to share and print your photos: http://photos.msn.com/support/worldwide.aspx
RE: [AMRadio] Illegal 27 & 28 MHz amplifier sales
It isn't "20 years". This stuff's been going on actively, and organized since at least 1973, when Siltronix, Browning, and others started marketing "VFO-sliders" for CB's. Then when Yaesu released the FT-101, with 11m built-in, the whole 11M band finally went to hell in a hand-basket, and took 500 kHz either side with it. The Siltronix 1011A 100W SSB transceiver is today a much sought-after collector's item. Covered 26.5 through 29 Mhz. Was a CB version of a Swan 270. I recall seeing "Boosters", "Footwarmers", "Boomers" and similar amps back in the '60's. Ed - VA3ES > > > Twenty years of :Law Breaking" still does not make it RIGHT ! >
Re: [AMRadio] Going to start parting out an Apache
I agree. And the asking prices for the pieces WERE exactly in line with the prices stated below. I was just irritated at the "SLAM" over parting out issue, since I couldn't get any takers. The biggest grief came from the facts: 1) Drums are cracked. I have YET to see an Apache or Mohawk WITHOUT cracked drums. Ron Eisenbrey, AB5WG, 115 First Street, Sugar Land, TX 77478 (281) 491-7823 Offers replacement drums at reasonable prices. 2) Dial cord(s) need to be restrung. Due to age and dry rot, a very common problem BUT a very simple and easy CHEAP repair. - Original Message - From: "Merz Donald S" > Actually, an important point could be overlooked in the heat and flames. > Post-war boatanchors are not rare. None. Never were and never will be. The > Apache is common as water. Which is why you can buy one for about $100 > restorable and $250 in mint working condition. > > There are a few 1930's boatanchors that are actually rare. But > paradoxically, these are not the most sought-after or high-priced items. > > The whole boatanchor disposal situation is going to get really interesting > over the next 10 years. By 2010, the peak of the babyboom is going to be > retiring, moving and disposing. I read somewhere that the aggregate total of > the inheritance that will be left behind by the babyboomers constitutes the > largest transfer of wealth in human history. > > Now, combine that thought with 1) the average age of all hams by 2010 will > be 60+ and they will not be looking to acquire new collections, 2) the > number of hams will have fallen by 25%, 3) digital radio technology will be > in full swing and making the terms AM and FM into fast-fading history, and > 4) antique radio associations such as AWA and public museums are already > storing far more equipment than they can actually display. > > So you make the call: What is the future of all of this non-rare equipment > that some of us have accumulated? How many "ham radio museums" will a > generally disinterested public actually support? > > 73, Don Merz, N3RHT
Re: [AMRadio] Illegal 27 & 28 MHz amplifier sales
Very FB Brian, We need more folks writing the FCC on these matters. Twenty years of :Law Breaking" still does not make it RIGHT ! About time we all stop saying sheesh ! Who Cares! es DO something. Tom - K0PJG - Original Message - From: "Brian Carling" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Cc: Sent: Friday, August 23, 2002 11:39 AM Subject: [AMRadio] Illegal 27 & 28 MHz amplifier sales > Dear Riley Hollingsworth & FCC, > > Please look into these illegal companies and their activities. > > Two issues: > > 1 - CBR Electronics Inc. > > http://www.cbrelectronics.com/keydowns.html";>Click here: > keydowns.page > > 2 - E-BAY INC. > > Also eBay is running a lot of ilegal advertisements now! > > Take a look at these items currently selling now as we speak on > ebay.1375120931 , 1374519437 ,1374954044,1374119655 . > Also see: > 1374401241, 1374437180, 1374749715, 1374941097 > > These are ALL ILLEGAL CB amps being brazenly allowed by eBay. > They are not legal to be sold for amateur use either, since > they cover the 27-28 MHz bands which is against federal law. > > Others are telling me that eBay is now unwilling to take action > to remove such ads they are running for illegal amplifiers. > > Fraudulent sales of illegal equipment needs to be stopped! > > > > > ___ > AMRadio mailing list > AMRadio@mailman.qth.net > http://mailman.qth.net/mailman/listinfo/amradio
Re: [AMRadio] Illegal 27 & 28 MHz amplifier sales
Why bother with this . FCC don't care , I don't care, Ebay don't care these amps have been for sale for the last 20 years & will always be .find something else's to do John
[AMRadio] Illegal 27 & 28 MHz amplifier sales
Dear Riley Hollingsworth & FCC, Please look into these illegal companies and their activities. Two issues: 1 - CBR Electronics Inc. http://www.cbrelectronics.com/keydowns.html";>Click here: keydowns.page 2 - E-BAY INC. Also eBay is running a lot of ilegal advertisements now! Take a look at these items currently selling now as we speak on ebay.1375120931 , 1374519437 ,1374954044,1374119655 . Also see: 1374401241, 1374437180, 1374749715, 1374941097 These are ALL ILLEGAL CB amps being brazenly allowed by eBay. They are not legal to be sold for amateur use either, since they cover the 27-28 MHz bands which is against federal law. Others are telling me that eBay is now unwilling to take action to remove such ads they are running for illegal amplifiers. Fraudulent sales of illegal equipment needs to be stopped!
[AMRadio] 40m
Anyone in the 5th call area that can get on 40m during the daytime?? How about a gathering on Saturday afternoons and Sunday mornings? Say around 9am Sundays, and 2 or 3pm on Saturday afternoons (family ties permitting, of course) 73 = Best Regards, -=Jeff/W5OMR=-
RE: [AMRadio] Going to start parting out an Apache
Actually, an important point could be overlooked in the heat and flames. Post-war boatanchors are not rare. None. Never were and never will be. The Apache is common as water. Which is why you can buy one for about $100 restorable and $250 in mint working condition. There are a few 1930's boatanchors that are actually rare. But paradoxically, these are not the most sought-after or high-priced items. The whole boatanchor disposal situation is going to get really interesting over the next 10 years. By 2010, the peak of the babyboom is going to be retiring, moving and disposing. I read somewhere that the aggregate total of the inheritance that will be left behind by the babyboomers constitutes the largest transfer of wealth in human history. Now, combine that thought with 1) the average age of all hams by 2010 will be 60+ and they will not be looking to acquire new collections, 2) the number of hams will have fallen by 25%, 3) digital radio technology will be in full swing and making the terms AM and FM into fast-fading history, and 4) antique radio associations such as AWA and public museums are already storing far more equipment than they can actually display. So you make the call: What is the future of all of this non-rare equipment that some of us have accumulated? How many "ham radio museums" will a generally disinterested public actually support? 73, Don Merz, N3RHT -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Sent: Thursday, August 22, 2002 6:23 PM To: amradio@mailman.qth.net Subject: Re: [AMRadio] Going to start parting out an Apache It really gets on my nerves when some folks go out of their way to make personal issues and attacks. I've been trying to "thin out the herd" for a little bit now. What I have found to be more the fact than the exception, is that folks want it NOT only inexpensive (Read CHEAP), BUT want no flaws, or for it to be restored too! I'll climb off my soapbox now. Bob - N0DGN - Original Message - To: Sent: Wednesday, August 21, 2002 16:35 PM Subject: Re: [AMRadio] Going to start parting out an Apache > Good Riddance! Nobody wants crummy 100 watt transmitters on the air anyway. > > Why don't you just take a sledge hammer to it and quietly put it out of its > misery? > > You must love Hallicrafters, CRAF-T-BOB, why don't you take out a few along > with the Heathkit. It'll make the remaining all that more valuable. > > Maybe you can sell the solder. > > > - Original Message - > From: <[EMAIL PROTECTED]> > To: "AM Radio" > Sent: Wednesday, August 21, 2002 1:00 PM > Subject: [AMRadio] Going to start parting out an Apache > > > > Folks, > > > > I have an unrestored Heathkit TX-1 Apache. > > > > Going to start removing the transformers and parting it out. No > > reasonable takers to date, thinning out the "herd" so to speak. > > > > I understand many are the same as used in the DX-100. > > > > Bob - N0DGN Craf-T-Bob (Because I love Hallicrafters!) > > R-390A EAC '67, R-390A Collins '52, BC-610I, BC-939B, > > and BC-614E ___ AMRadio mailing list AMRadio@mailman.qth.net http://mailman.qth.net/mailman/listinfo/amradio * DISCLAIMER: The information contained in this e-mail may be confidential and is intended solely for the use of the named addressee. Access, copying or re-use of the e-mail or any information contained therein by any other person is not authorized. If you are not the intended recipient please notify us immediately by returning the e-mail to the originator. --- StripMime Report -- processed MIME parts --- multipart/alternative text/plain (text body -- kept) text/html The reason this message is shown is because the post was in HTML or had an attachment. Attachments are not allowed. Please post in Plain-Text only.---
RE: Re: [AMRadio] Going to start parting out an Apache
You are correct Bob - I have serveral of the big green boxes here - in mint to dog condx - Two others I have parted out to make one of the nicer ones operational again. I wont even mention the Viking II parts units Just dont use the phrase "parting out" - if you want to sell a part or need on - just post "part for sale" or "part needed".. Maybe the crazies will then leave you alone Gud luck with your projects. I've been trying to "thin out the herd" for a little bit now. What I have found to be more the fact than the exception, is that folks want it NOT only inexpensive (Read CHEAP), BUT want no flaws, or for it to be restored too! I'll climb off my soapbox now. Bob - N0DGN
[AMRadio] About Microphones and Impedance matching
Impedance matching is a topic that many new comers don't have a real grip on and no wonder. There are so many strange applications and problems. So I will take this opportunity to tell what I have learned. (OR NOT some may disagree) 1. Matching source impedance to load will cause the source to deliver the most power to the load. This is a math fact. For instance a 12 Volt lead acid battery with and internal resistance of .05 ohms when attached to a resistance of .05 ohms will deliver its maximum power of 720 watts. If the load resistance is decreased lower than the internal resistance of the battery the current will increase but not as fast as the voltage across the load decreases so the product (E * I) is something less than the power at the matched impedance. When the internal resistance of the source is matched to the load and max power is transferred, you must realize that the source is dropping half the voltage and dissipating the same power as the load, 720 watts in the above case. This may not be desirable!! Maximum power transfer is seldom the reason for a recommended load resistance. Desired output, efficiency, and distortion products are what should to be considered. 2. The recommended load impedance for something like a microphone seldom has anything to do with power transfer from microphone to input circuit. The things to watch for here are damping effects verses frequency response, and the voltage gain of the input circuit. If the load on the microphone is too low of a resistance the microphone will have very good damping but low output voltage and often will fall short of the desire frequency response. In the case of piezoelectric devices this is generally a loss of low frequency response. If the load provided by the input circuit is too high the damping is not good. Resonances may occur and some times even oscillations. Damping is the ability of a mechanical device to stop vibrating after the source of energy that started it vibrating is removed. Guitar stings and piano strings are designed to vibrate after they are struck. The will vibrate for quite a while or until "damped" by fingers. This is not the desired effect that we want from a microphone. Instead we want the microphone diaphragm to follow the incoming wave front of air, and not to take off on its on vibration. If damped well, it will more closely produce a voltage waveform that resembles the air movement wave. Some times it is more desirable to put a much lower resistance on the microphone and let the output and frequency response drop off some then add more amplification and equalization to the input circuit. But be careful with over doing the equalization as this can cause phase shifts. Phase shifts can alter the waveform a lot and quite noticeable in the lower frequency bass notes. Remember that the voice is not a sine wave but a complex waveform of many shapes. Yes these shapes can be broken down mathematically to sine wave frequencies but the phase relationship and amplitude of the many frequencies is what gives the certain shape to a specific wave front of air. Changing the phase of only one part of the group of frequencies will change the additive shape of the result, especially if equalization is done in a very narrow band of frequencies. Equalization curves should be gradual changes to get the desired results and avoid sharp changes in the curves. Placing a resistance in series with the input circuit will allow the microphone more freedom to produce and this may be desirable depending on the microphone but it will also cause a loss of damping and more gain in the input circuit will be required. In some cases this may be just turning up the MIC gain. I have found the condenser cartridges from Radio Shack to be quite good. I mounted two of them on a circuit board and built a mixing amp right on the board to combine there outputs. For what reason, I'm not sure. Something told me that if the cartridges had different frequency responses that putting two together would be a broader response and if they didn't then it would hurt. Anyway, the amplified MIC will work into loads as low as 1000 ohms with an output voltage of 2 Volts at close range. I have it currently attached to a line level input of the speech amplifier with an input resistance of 500K ohms. There is no damping problem here because it is one amplifier driving another at the proper level. The Microphone cartridges them selves or decouple with 1200 ohm resistor in series with each cartridge output and then at the junction there is a 470 ohm to ground. This type of circuit provides isolation, one cartridge from the other so that one doesn't drive the other to much and provides damping for each. The junction of the 3 resistors is connected to the input of a two transistor amplifier circuit. I could have got enough gain from one transistor but I needed the phase reversal of the second stage to match the pha
