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I'm glad to have posted this. It's nice to see ops who choose to break the barrier of normality and refuse to accept eBay mods such as the shottky diode detector. Although I haven't posted in a minute, I have been following along with people's progress which lit a fire under my behind to...

Great news!! The voice you hear aren't in your head. I thought the same thing too!! But it's the extra .2 -.3 volts that the feedback returns as signal. I go back and forth between the PDD and PLL det. and for dx and hearing, it the PDD as a clear winner. I have a little PCB with the...

@711 You've proved a nice write up as well. Thanks for taking the time on this post. One may want to consider reading the manufactures data sheet when selecting opamps as some may become unstable in unity gain. The input impedance of the op amp's inverting pin is quite low and relies...

@loosecannon You don't sound like a novice!!! Yes, that is exactly what I was trying to say. Thanks for taking the time to write that out. Best CBphreaker

@Whisky Flats Get your soldiering iron ready!!!

@tecnicoloco Thanks for the handy information. Ill give it a try here, in the short future. And thanks for your kind thoughts, as well. @loosecannon Short pins 6 and 7 - Build a "Vref voltage" which is 1/2 Vcc and apply that voltage to pin 5. Don't for get to by pass pin 5 to ground with a...

@loosecannon I would think the NTE is okay. It really is best to terminate your unused opamp, or use it for something. Referring to the schematic in the attachment. For Vref you can just use 2 10ks, bypass with poly .1 cap. CBphreaker

@loosecannon Hello, Garbled or distorted sound is usually an error in the feedback area. The audio should be extremely clear and very articulate. CBphreaker

Hello Technicoloco, Thank you for the like on my post. I truly appreciate it. Warmest Regards, CBphreaker

Unfortunately, there's more to it than swapping wires.

I couldn't help myself so I had to mod the mod. I was looking to get more peaks so I added a much more precise and independent power control circuit. Here is the result. I was thinking of making a web site with way more details. So all can enjoy modding at their leisure . It would be all...

@loosecannon I did use the second opamp as a line-in driver. It only required a gain of 4 or 5 so not to much. I'm sure you already did this, but did you stick your scope probe on the output of the detector? Many radios will still receive (but generally lower in volume) even if there is no...

I had a wonderful time this weekend messing about with my 2000 last weekend and just about finalized the conversion to Low Level AM with the addition of a new Jfet audio buffer amp (see attached pic). A few other misc items need to completed but none pertaining to TX audio (I think anyway)...

@711 Cool, I'm excited for you. Good on ya' I found, on my setup, I needed just a bit of gain. Right now, I have a gain of 5. So, not to much and it has plenty of volume. Just to give you a reference point.

@Klondike Mike Thanks for the kind words. The exact problem was the my lack of isolating the ssb filter properly and an incorrect input capacitance to the balanced modulator. The combination of the two was enough the foul my tests. I will have to investigate but it seem my computer looses...

@loosecannon You don't need C64, D21 or D22. Install the input to the precision detector where the input to C64 was and the output goes to where the output of D22 was. That's it. Yes, it will work with your already installed line out. ANL- you don't have to bother with all that, just...

Actually, I was just playing around and found that configuration was wrong on the 2000. The mods you posted are for high level radios using the stock preamp and TA7222. I don't use the stock preamp or the TA7222. I'm simply unbalancing the balanced modulator and feeding that with audio...

Don't put to much faith in that. It's best to hear it. Also the screen is super squashed so the sides look very close together. Also my transmitter my not be able to reproduce the tones perfectly and the detector is showing its flaws. Ill haven't really had a chance to go through my TX audio...

@loosecannon As it pertains to the Precision Diode Detector Not only will you get lower distortion but this circuit removes the forward voltage drop. Which is why you want to match your diodes. You can use shottky, germanium, or silicon. It makes no difference in performance. I've use...

Well, it may give him something else to do other than swap wires. If he does take it claim at his own, and builds it correctly, it will only be beneficial to his clients. It might be strange, however, for someone who primarily does "nothing work" to some how magically come up with a product...