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Just wanted to add some thoughts here . . .

It is true that the 2999 has only 2.1db gain/avg over the stock 1674 and has only .8db less noise floor. of the same, there is a bigger picture to it For example, if you add both the .8db smaller noise floor with the 2999's/2.1db gain; the perception is a nearly three ('2.9db') or consistent. Your mileage may vary.

But so many experimenters that do this mod and don't have the means to re-align the receiver, it is questionable that any real difference may be realized in every circumstance. The state to tune/alignment in any given radio isn't equal at any one time, so your results will vary accordingly.

In addition, while using Schottky diodes for the Noise Blanker and the receive circuit has modest but useful gains, the original germanium diodes throughout the rest of the radios other circuits should not be replaced with the Schottky devices. I have gotten a radio once so modified, and had to repair it back to stock. The Schottky diodes many be a much faster switching device, but it also has a higher voltage turn-on point. SO the net result is a radio that has less receive sensitivity overall. IOW, best to just stick to replacing the basic four diodes - and leave it at that. More is NOT better.

Just some of my observations and thought so far.
Interested in any feedback . . . Thanks

<blockquote data-quote="Robb" data-source="post: 633298" data-attributes="member: 8446">Just wanted to add some thoughts here . . .It is true that the 2999 has only 2.1db gain/avg over the stock 1674 and has only .8db less noise floor. of the same, there is a bigger picture to it&nbsp; For example, if you add both the .8db smaller noise floor with the 2999&#039;s/2.1db gain; the perception is a nearly three (&#039;2.9db&#039;) or consistent.&nbsp; Your mileage may vary.But so many experimenters that do this mod and don&#039;t have the means to re-align the receiver, it is questionable that any real difference may be realized in every circumstance.&nbsp; The&nbsp; state to tune/alignment in any given radio isn&#039;t equal at any one time, so your results will vary accordingly.In addition, while using Schottky diodes for the Noise Blanker and the receive circuit has modest but useful gains, the original germanium diodes throughout the&nbsp; rest of the radios other circuits should not be replaced with the Schottky devices.&nbsp; I have gotten a radio once so modified, and had to repair it back to stock.&nbsp; The Schottky diodes many be a much faster switching device, but it also has a higher voltage turn-on point.&nbsp; SO the net result is a radio that has less receive sensitivity overall.&nbsp; IOW, best to just stick to replacing the basic four diodes - and leave it at that.&nbsp; More is NOT better.Just some of my observations and thought so far.Interested in any feedback . . . Thanks</blockquote>

[QUOTE="Robb, post: 633298, member: 8446"] Just wanted to add some thoughts here . . . It is true that the 2999 has only 2.1db gain/avg over the stock 1674 and has only .8db less noise floor. of the same, there is a bigger picture to it For example, if you add both the .8db smaller noise floor with the 2999's/2.1db gain; the perception is a nearly three ('2.9db') or consistent. Your mileage may vary. But so many experimenters that do this mod and don't have the means to re-align the receiver, it is questionable that any real difference may be realized in every circumstance. The state to tune/alignment in any given radio isn't equal at any one time, so your results will vary accordingly. In addition, while using Schottky diodes for the Noise Blanker and the receive circuit has modest but useful gains, the original germanium diodes throughout the rest of the radios other circuits[B] should not[/B] be replaced with the Schottky devices. I have gotten a radio once so modified, and had to repair it back to stock. The Schottky diodes many be a much faster switching device, but it also has a higher voltage turn-on point. SO the net result is a radio that has less receive sensitivity overall. IOW, best to just stick to replacing the basic four diodes - and leave it at that. More is NOT better. Just some of my observations and thought so far. Interested in any feedback . . . Thanks [/QUOTE]

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