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I have no problem with USB or LSB on 1 - 8.

I do get the red TX light Robb. There are no cut traces and no open wires around the PLL either, although the solder on the PLL is definitely fresh. I also get the carrier that bounces back and forth between 3 and 4 on my watt meter, about 3 times a second or so. Modulation is still good on...

OK Robb, I figured out why I wasn't getting any mA reading on either meter... I blew out a fuse in each one, apparently VR 8 & 9 were turned wayyy up!! I did get them down where they should be. I still have 13 volts at 8 & 9. One thing that is puzzling me... on the Angelfire alignment page...

I got the parts yesterday and put them in. I now have 8 volts on pin 9, which is good. I do not get any mA out of TP 8 or 9 still, and am getting about 13 volts there still. I am getting good modulation on USB and LSB, just not on AM. The meter was bouncing back and forth when I key up on...

That is showing 9.45 volts. When I took the reading on TP8 & 9 I didn't disconnect the wires, just to let you know.

Just checked Robb and I have no TX light now and have 13 volts on TP 8 and TP9, which I assume is a voltage regulator issue?

I just ordered the zener diodes and the mb3756, should be here Wednesday I hope.

Hi Robb, The only mod now is the Schottky Diode upgrade that I did. Thanks for the service bulletin! I have a few Cobra 29 LTD's sitting around, do you know off hand if they have the Zener I need? I believe they also have the MB3756, I could borrow them until I get some in the mail. I...

Now I'm back to keying up and get a carrier then a few seconds later it starts oscillating, meter starts at 6 and then drops down and bounces between 2 and 4. When I was recapping, I replaced c172, an electrolytic next to the transformer, and I noticed D44 was broken. I don't know if I broke...

I have two meters, a BK 2709B and a UEI393. I tried on both of them and nothing at all. Positive to post negative to detached lead, positive on meter to mA socket, meter set at mA, key up and nothing at all on either post. The clarifier has not been modded. I checked and saw 4 or 5 ways to...

I have no output power at all. I did get the oscillating to stop however. With the carrier alignment I have LSB and USB on the money, when I tx on 19 AM it is supposed to be 7.8 Mhz but I am showing above 16 Mhz. Also when I key up I get backwards swing on the cb meter, the Hitachi watt meter...

One more thing... when I key up the mike the carrier swings to about 10 on AM, after a second or two it drops down to about 6 and the needle starts bouncing between 5 1/2 and 6 1/2 on my wattmeter and the meter on the cb, like it's oscillating?? Don't know what that's about!

I checked this and there is no changes to the clarifier. All of the mods had wires switched around on the knob but this has 3 wires that go straight to the board. I got the VCO voltage right on the money. Had the clarifier at 12:00 and got the CH19 AM, USB, LSB right on the money. I went...

I will work on this when I get home from work today and get back to you. Thanks for the help!!

I picked this Grant XL up at a hamfest for a great price but am having problems getting it aligned... I am using these alignment instructions The Defpom Grant XL (PB-208AA) alignment page When I first put it in my truck the tx and rx were not that great, I figured it needed to be aligned...

I just received one of these and when I tested several Cobra 29's the needle barely moved from dead key in avg mode, when I switch to PEP I get pretty good swing. When I test my Connex 3300hp-zx I get good swing on avg and real good swing on PEP. I would think that I should get some movement...

Yep, I have gotten a lot of info from cbtricks! Thanks for the reply, I will try tuning them a bit.

I took this back to R&R last week and they checked the alignment on the receive side, made some adjustments and it is excellent again:)!

I am having a problem with the NB on this radio, it doesn't matter what position I have it in, it makes NO difference in the noise level, all 3 positions sound exactly the same. I did do the schottky upgrade last year to it which I liked, I don't think the noise got any worse since doing it. I...

I took it back to have them check it, after I removed the resistor, and they said it's fine, but the receive is definitely not as good as it was before.