"Eugene Balinski" <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- Definitely replace the mic. Look for something with an impedance of approx 50k ohms (Hi-z). I have seen plenty of hand mics that will do that.
Alternately, you can wire in an impedance transformer on a low-Z mic. Radio Shack used to carry them. I believe that Bob Heil has them also. 73 Gene K1NR On Sun, 20 Jan 2008 09:25:56 -0500 "Rich Carter" <[EMAIL PROTECTED]> wrote: > > "Rich Carter" <[EMAIL PROTECTED]> made an utterance > to the drakelist gang > ---------------------------------------------------------------------- > > Mike > I'll take your suggestion and replace the mic. > > Thanks > Rich > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED] On Behalf Of Mike > Williams > > Sent: Sunday, January 20, 2008 7:51 A > > To: [EMAIL PROTECTED] > > Subject: Re: [drakelist] Microphone question > > > > > > Mike Williams <[EMAIL PROTECTED]> made an utterance > to the > > drakelist gang > > > ---------------------------------------------------------------------- > > Just a suggestion Rich; try a Shure 444 or D104 > (without the > > preamp) on your TR-3. This radio and the 4 line have a > High > > Z mic input. You will get good results with either of > these > > 2 mic's although there are a myriad of others that will > fill > > the bill as well. > > > > Good DX! > > > > Mike W4DL > > > > Ron Wagner wrote: > > > > > > Ron Wagner <[EMAIL PROTECTED]> made an utterance to the > drakelist gang > > > > > > ---------------------------------------------------------------------- > > > Rich, > > > It has been a while since I had my TR3, but I do > remember > > that a 600 > > > ohm hand mic I had tried was not good match for the > rig. I would > > > guess 2K ohms would be in the ball park. They were > made in > > the days > > > of high impedence mics. > > > > > > As far as getting only a few watts out, how are you > > measuring that? > > > Most watt meters I have seen (unless they are peak > reading) > > only show > > > a few watts of RF on the Drakes while measuring SSB. > > > Drakes are not > > > using compression, so they have a very large peak to > average power > > > ratio. What that means is that unless the meter is > > designed to read > > > peak power, it will show a very low average power. > Average power > > > being what most meters read. My TR7 typically shows > about > > 5 watts on > > > my Drake MN4 watt meter. And I know that on a peak > watt > > meter I have > > > ~200 watts going out. > > > > > > One last thing, on AM it will also show low power. > Drakes use > > > controlled carrier AM. That is the carrier changed > as you spoke. > > > What that does is lower the heat on the finals. The > TV sweep tubes > > > were designed for high peak, low average power. If > you ran > > them any > > > other way, you wore them out very quickly. Ideal for > > > uncompressed SSB > > > service, not so good for other service. > > > > > > Hope this helps. > > > > > > 73, > > > Ron WD8SBB > > > > > > On Sat, 19 Jan 2008, Rich Carter wrote: > > > > > >> The mic came with the rig. I assume they should > work > > together. The > > >> mic seems to work, but it doesn't have enough drive > for > > the radio. I > > >> only get a couple of watts out for SSB if I yell > into the > > mic. The > > >> problem could be in the rig, but I thought it best > to > > check the mic > > >> first. I opened it up. > > >> There's a 4 ohm microphone element and a matching > transformer that > > >> says BT3 > > >> 001 on it. I can find no specs for the mic. What > is more > > >> frustrating is there appears to be no information > about what the > > >> drake transceiver wants for mic impedance. I don't > have > > any matching > > >> transformers in my spare parts bin. Before I run > out > > there and buy > > >> some parts, I thought it best to see if anyone knows > what the heck > > >> the rig wants. > > >> > > >> Thanks for the reply > > >> Rich > > >> > > >> > > > > > > > > > ---------------------------------------------------------------------- > > > Submissions: [EMAIL PROTECTED] > > > Unsubscribe: [EMAIL PROTECTED] - > unsubscribe > > drakelist in > > > body > > > Hopelessly Lost: [EMAIL PROTECTED] - help in > body of message > > > Zerobeat Web Page: www.zerobeat.net - sponsored by > www.tlchost.net > > > > > > ---------------------------------------------------------------------- > > > > > > > > ---------------------------------------------------------------------- > > Submissions: [EMAIL PROTECTED] > > Unsubscribe: [EMAIL PROTECTED] - > unsubscribe > > drakelist in body > > Hopelessly Lost: [EMAIL PROTECTED] - help in > body of message > > Zerobeat Web Page: www.zerobeat.net - sponsored by > www.tlchost.net > > > ---------------------------------------------------------------------- > > > > > ---------------------------------------------------------------------- > Submissions: [EMAIL PROTECTED] > Unsubscribe: [EMAIL PROTECTED] - unsubscribe > drakelist in body > Hopelessly Lost: [EMAIL PROTECTED] - help in body > of message > Zerobeat Web Page: www.zerobeat.net - sponsored by > www.tlchost.net > ---------------------------------------------------------------------- --------------------------------------------------------------------- Web mail provided by NuNet, Inc. 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