"Peter Bent" <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- Hi Sorry I am just getting into this conversation. Pull the mike apart and check all the connections, if you haven't done that. Bought a second hand mike from Ebay and although it did not work as advertised with my Drake Tr-7, soldering a broken wire solved the problem and it works like a charm.
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Jim Shorney Sent: Sunday, January 20, 2008 5:48 PM To: [EMAIL PROTECTED] Subject: Re: [drakelist] Microphone question "Jim Shorney" <[EMAIL PROTECTED]> made an utterance to the drakelist gang ---------------------------------------------------------------------- On Sun, 20 Jan 2008 16:36:19 -0500, Eugene Balinski wrote: > >"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. >From the description, the Collins mic he has already has a transformer in it. I wouldn't toss the Collins mic on the heap just yet, there may be a problem in the mic circuit of the radio. It should also be pointed out that measuring DC resistance with an ohmmeter is not the same as measuring impedance. You are only measuring the DC resistance of the wire. This will not provide an accurate measurement of impedance, it will only tell you (in the case of a transformer) which side is high and which is low. To measure the actual impedance, you need to get a little fancier. 73 -Jim -- Ham Radio NU0C TR7/RV7, TR6/RV6, T4XC/R4C, L4B, NCL2000, SB104A, R390A, GT550A/RV550A, HyGain 3750, IBM PS/2 - all vintage, all the time! HyGain 3750 User's Group - http://groups.yahoo.com/group/HyGain_3750/ ---------------------------------------------------------------------- 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 ----------------------------------------------------------------------
