Mahlon Haunschild <[EMAIL PROTECTED]> made an utterence to the drakelist gang
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One more thing: the switch on top of the microphone controls PTT & audio just like the switch bar on the base. Use either one, but not both.
regards,
Mahlon - K4OQ
Eric Webner wrote:
Shure mic that was so popular: the 444.
Al Parker <[EMAIL PROTECTED]> wrote:
"Al Parker" made an utterence to the drakelist gang ---------------------------------------------------------------------- Hi Bill, The plug is OK, same as the switchcraft as far as dimensions, etc. are concerned. The problem is the mic. If I'm correct, the KW MC50 is a low impedance mic, and you need a high impedance mic., or I guess you could use a small mic transformer to transform the impedance. The MC50 can show output on the scope, and be working properly, but not into a ckt that requires a high impedance input. You need an older type dynamic or xtal mic, like an Astatic D-104, or Shure 544 (think that's the shure nr), or others. -or find the one that came with the rig ;-) 73, Al, W8UT New Bern, NC BoatAnchors appreciated here http://www.thecompendium.net/radio/ http://www.hammarlund.info
-! ---- Original Message ----- From: "billgoodwin" To: Sent: Tuesday, November 02, 2004 12:16 AM Subject: [drakelist] No or very weak audio on TR4
> > billgoodwin made an utterence to the drakelist gang > ---------------------------------------------------------------------- > I am trying to get my old TR4 back on the air. I seem to be putting out > a good rf as shown on my old Philmore SWR meter but am told that my audio > is extremely weak and hardly understandable. I lost the Electrostatic mic > that came with the rig and replaced it with a Kenwood MC50. I notice the > manual says a Switchcraft s-230 plug is "required". The chap who sold me > the mic did not use this plug. He responded to a question as to plug > compatibility as follows > > The plug I used on the MC-50 is a standard PJ-068 military p! lug that was > used by Uncle Sam on Drake and Collins rigs, and has worked fine thru > the years. There is a switch on the microphone itself that needs to be > ON, but I am sure you know that. I didn't have a Drake rig to check the > mic on, but did check it on a scope, and there was output there. > > Can any one help me re increasing audio signal, mic plug compatibility > or anything that will help me get a stronger audio. > > Thanks > Bill > KD4FGU
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