Could this possibly be another one of those transmit crystal problems? I had that same low-deviation problem with a UHF Motorola MICOR Repeater. I had a company up in Canada recrystal my channel elements, instead of using ICM, who I always used before. When I tuned up the exciter with the newly reworked element, I found that I could only get about 2 kHz deviation out of the transmitter.
Having ICM recrystal the channel element with one of their crystals fixed the problem - now I can go easily to 5 kHz (and more, if I wanted it). One of those cases where I tried to save a few bux and got bit. What's that old saying that goes something like "penny wise, pound foolish?" LJ -----Original Message----- >From: Kris Kirby <[EMAIL PROTECTED]> >Sent: Nov 29, 2006 4:42 PM >To: [email protected] >Subject: Re: [Repeater-Builder] GE Exec II Conv. Max audio 1.5 KHz Dev, how >can I increase it > >On Wed, 29 Nov 2006, Bob Dengler wrote: >> You can really use just about any op amp, even the old 741. For that >> one the output is pin 6, not pin 1, & the V+ supply goes to pin 7 >> instead of 8. I recommended the TLV2372 or LMC6482 because they're >> less prone to crossover distortion. >> >> If you want to order the good ones: >> >> TLV2372: Digikey: 296-12219-5-ND $1.30 Newark: 76C7976 $1.30 Mouser: >> 595-TLV2372IP $1.30 >> >> LMC6482: Digikey: LMC6482IN-ND $1.82 Newark: 41K2662 $1.92 > >Let's see.. there's a bunch of op-amps that come to mind... there's >'audiophile' amps out there, and there's just instrumentation stuff... >the LM324 is pretty common, as well as the LM1458 and it's cousin the >LF353 (JFET inputs). NE5532 is an audiophile part, but certainly works >as well. > >They are really easy to use; gain is set by resistors typically. Some of >them are single supply, others are dual supply. > >-- >Kris Kirby ><[EMAIL PROTECTED]>
