I *AM NOT* advertising, or teying to sell anything. Let me start off by saying that. I am only here to share information. When we used to do this mod to the amplifiers, we would charge 80.00 for the 4 or 5 transistor amplifiers, although on the 667 we really would push customers to just allow us to bypass the driver. If they insisted, we would still do it up, and only charge the extra 3.00 in parts to rework the driver. The issue is that as the amplifier stands, the driver shares the bias supply with one of the push pull pairs on the "finals". This is a no-no.
The 2 transistor amplifiers, we would charge half, 40.00.
Once again, not advertising, just throwing out the numbers of what we used to charge to maybe give you a fair starting point.
EDIT: Was just thinking, what about, (I have been contemplating it for years) a step by step guide for amplifiers, export radios, with things like how to fix issues we just discussed, installing aftermarket filters like collins, etc into export radios, changing the RF amps and IF amps to dual gate mosfets, changing audio frequency response of transmitters and receivers, etc? Kind of like the older "super duper secret screwdriver hack job" books, but instead written more like a Lou Franklin book, like the Getting Started In Electronics.... only with general sections that apply general theory on the modifications, so with the knowledge it can be applied to most devices, and then also different volumes that cover step by step instructions for popular chassis radios? Even some ham radios could be covered, for instance flaws in the FT-100 / 100D, Icom 706MKIIG, come to mind with some things the users could do, if they wanted to attempt it. But they would be REAL mods, not just cut a part, or turn this. Maybe another volume dedicated to just radio theory, another on antenna myths, etc. It could really go a long way and help the community and get good information out there. Plus, everyone feels good when they accomplish something themselves. I certainly don't want to stray or hijack this thread, so I will get back on subject, but even this little conversation back and forth shows me that there are educated people on RF theory, and also operators that do desire to runs things properly, but have a lack of resources to do so.
The 2 transistor amplifiers, we would charge half, 40.00.
Once again, not advertising, just throwing out the numbers of what we used to charge to maybe give you a fair starting point.
EDIT: Was just thinking, what about, (I have been contemplating it for years) a step by step guide for amplifiers, export radios, with things like how to fix issues we just discussed, installing aftermarket filters like collins, etc into export radios, changing the RF amps and IF amps to dual gate mosfets, changing audio frequency response of transmitters and receivers, etc? Kind of like the older "super duper secret screwdriver hack job" books, but instead written more like a Lou Franklin book, like the Getting Started In Electronics.... only with general sections that apply general theory on the modifications, so with the knowledge it can be applied to most devices, and then also different volumes that cover step by step instructions for popular chassis radios? Even some ham radios could be covered, for instance flaws in the FT-100 / 100D, Icom 706MKIIG, come to mind with some things the users could do, if they wanted to attempt it. But they would be REAL mods, not just cut a part, or turn this. Maybe another volume dedicated to just radio theory, another on antenna myths, etc. It could really go a long way and help the community and get good information out there. Plus, everyone feels good when they accomplish something themselves. I certainly don't want to stray or hijack this thread, so I will get back on subject, but even this little conversation back and forth shows me that there are educated people on RF theory, and also operators that do desire to runs things properly, but have a lack of resources to do so.
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