[AMRadio] retro 75

Brett Gazdzinski Brett.Gazdzinski at verizon.net
Wed Apr 7 22:53:46 EDT 2010

Well, I did not try it on TX yet, as the modulator chip is backordered.
I do get 2.5 watts carrier out though.

I like designs with no rf amp before the mixer, that is what I do with the 
homebrew receivers, and the retro does the same thing, the filter works 
well, but without any agc, strong signals get a lot louder than weak ones 
I also have distortion on strong signals, not real bad but its there, but 
maybe from the guys who modulate way over 100%, but I have to make some 

Like some other kits I have built, I am always amazed at how well a small 
handful of parts can work.


----- Original Message ----- 
From: "Robert Nickels" <ranickel at comcast.net>
To: <amradio at mailman.qth.net>
Sent: Wednesday, April 07, 2010 10:21 PM
Subject: Re: [AMRadio] retro 75

> On 4/7/2010 5:53 PM, Brett Gazdzinski wrote:
>> I built it, it works well.
> Great to hear Brett!   That was going to be my plan today, but I had a
> date with Turbo Tax instead ;-(    I'm really impressed with the design
> and am anxious to get mine going.
> I mentioned having a Yahoo group or such to Dave so we'd have a spot to
> share pictures and best practices, but he's pretty busy just getting the
> kits out.   So maybe someone will start one up  (I'm busy soldering!)
> 73, Bob W9RAN
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