BTW… the new stack of RF Boards here… have the following updates:

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1. Removed all of the MF stuff but left the jumpers to CLK0 and CLK1 so that they could be driven from something else or checked with no load.? MF done in software now.
2. Added a cap C74 at the junction of L7 and Y1 VDD. ??This was inadvertently missed in all versions.? If anything, cleans up the noise floor a little.
3. Changed U106 to a AD8599, and U107 to a OPA2209 (better S/N by at least 20 db). ??Better parts, but the previous parts will work (Identical footprints) in a pinch too with higher S/N.
4. U21 pin 27 now not connected to anything.
5. Holes behind the PE4302/PE4312 attenuators to make them easier to solder.

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This is not intended as a replacement for existing V12.6 RF boards… but rather convenience upgrades if you need a new RF board.

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I think the RF board is incredible.? It rivals many of the commercial radios I have in my radio room.? Lots of people here and all over the world helped with prototyping, building, suggestions and insight, and testing to make this so.

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Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ

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Owner - Operator

Big Signal Ranch – K9ZC

Staunton, Illinois

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Owner – Operator

Villa Grand Piton – J68HZ

Soufriere, St. Lucia W.I.

Rent it:

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Moderator: North American QRO Group at Groups.IO.

Moderator: Amateur Radio Builders Group at Groups.IO.

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email:? bill@...

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