Re: Low mic gain, was, show your mic
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sorry to have bothered you, Max
On Mon, Apr 23, 2018 at 8:27 AM, MAX <max@...> wrote: Interesting.? That picture has no indication as to which is positive and which is negative.? If I didn¡¯t already know that the upper right connection was ground the picture would be useless.? I am probably offending some people but I¡¯m about fed up.? All of the correct information needs to be gathered in one place.? Call it a manual or whatever you want but ?someone who knows needs to take the time and put forth the effort to put it together.? And then all the incorrect information needs to be removed from the web.? ? Not a happy camper. ? Max K 4 O D S. ? I've Never Lost the Wonder. ? Antique Electronics Site: ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Mvs Sarma
Sent: Sunday, April 22, 2018 1:57 PM
To: [email protected]
Subject: Re: [BITX20] Low mic gain, was, show your mic ? please see the photo here.
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The right side pin is for Ground. if i recollect , a reverse polarity was also responding for voice but verey very lowand distorted.
? On Sun, Apr 22, 2018 at 10:15 PM, MAX <max@...> wrote: Hi sarma. ? I¡¯m sure I have the polarity correct.? Someone on this list posted a drawing showing how to identify the negative terminal and I wired according to it.? I think the electret mic wouldn¡¯t work at all if polarity were reversed.? What is being powered is an ?F E T source follower.? ?I think I shouldn¡¯t have to raise my voice to get 5 watts output on 40 meters. ? Regards. ? Max K 4 O D S. ? I've Never Lost the Wonder. ? Antique Electronics Site: ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Mvs Sarma
Sent: Sunday, April 22, 2018 3:44 AM
To: [email protected]
Subject: Re: [BITX20] show your mic ? ?please check whether the mic body is connected to chasis ground. i mean the positive bias voltage for mic should come on independent pin and NOT to the body pin of the eletret element. In case you are using a dynamic mic, perhaps we need more gain and your need to shout appers logical. regards sarma vu3zmv
? On Sat, Apr 21, 2018 at 11:27 PM, MAX <max@...> wrote: Speaking of mics, I have to raise my voice almost to the level of shouting to get 5 watts out on 40 meters.? Is this normal or should I look for a problem? ? Regards. ? Max K 4 O D S. ? I've Never Lost the Wonder. ? Antique Electronics Site: ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Mvs Sarma
Sent: Saturday, April 21, 2018 7:17 AM
To: [email protected]
Subject: Re: [BITX20] show your mic ? I had grabed a taperecorder mic with 3.5mm mono pin.
?replaced the cable with 2+shield.had a small pushed switchmounted and wired.
?repalced the 3.5mm momo pin to stereo pin. Here is a image of my mic.The pp9 battery helps to imagine the mic size.
regards
?sarma
?vu3zmv
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