Jedi PS mic TX Ripple

[Rayjk110]

I have a jedi PS mic, mdl NMN6243B, connected to a UHF HT1000. I've noticed that, in the TX audio, there is a semi-quiet rippling noise in the backround. I've also noticed that a few of the other radios in our department do this too with the mic attached, but not all of them. Is there a reason or cure for this?

[DPL]

PL or DPL? I've noticed a warbling or rippling sound on many Jedi radios when using DPL, but I don't recall it being related to a public safety mic. Probably something different, but just thought I'd throw that out there.

I just tried my public safety mic on my UHF MTS2000. It's a different model (NMN6228C), but I didn't notice a difference in the TX audio when I talked on the mic versus talking on the internal mic with the external one unplugged.

[MTS2000des]

very common problem with Jedi's, especially if they are older than 2001. There was a SRN out a while back with a "Jedi noise kit" that consisted of some replacement flexes, a new front shield assembly, and associated parts. One thing I have done to earlier Jedi RF boards (especially VHF and UHF) is added a slight bit of solder between the VCO shield cans, this usually quiets the "crackling" sound but the hum/rumbling is usually do to RF feedback into the A/D converter in the audio/signalling ASFICS...will try to dig out the SRN. When were your HT1000's made? fairly common on mid 90's radios from my experience...

[Will]

Also caused by the incorrect antenna on your PS spkr/mic.
Poor match to the transmitter RF causes RF to get back into the radio as MTS2000des described.

[Rayjk110]

very common problem with Jedi's, especially if they are older than 2001. There was a SRN out a while back with a "Jedi noise kit" that consisted of some replacement flexes, a new front shield assembly, and associated parts. One thing I have done to earlier Jedi RF boards (especially VHF and UHF) is added a slight bit of solder between the VCO shield cans, this usually quiets the "crackling" sound but the hum/rumbling is usually do to RF feedback into the A/D converter in the audio/signalling ASFICS...will try to dig out the SRN. When were your HT1000's made? fairly common on mid 90's radios from my experience...

It's a BN revision, R split, IS rated. It's one out of a lot that I recently purchased, and have not tested them all yet to see if it dup's the problem. They were NOS. I'll try to get the serial 123ABC part when I get home.... I think it was AXS but I'm not for sure on that.

[apco25]

Very common jedi problem and varies from barely there to making the radio sound like total crap. Fixed many with the solder trick before the SRN flex kit came out.