开云体育

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Re: RF Board update.

K9HZ All Messages By This Member #32826 开云体育 Yes… Its shown on the BOM that is out there currently… ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? toggle quoted message Show quoted text From: [email protected] <[email protected]> On Behalf Of jjpurdum via groups.io Sent: Thursday, February 20, 2025 10:17 AM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] RF Board update. ? My bad, I loaded the wrong schematic. If I want to add C74, is it a 0.1?F bypass cap like C85? ? Thanks! ? Jack, W8TEE ? On Thursday, February 20, 2025 at 11:07:07 AM EST, K9HZ <bill@...> wrote: ? ? It’s out there… Here it is: ? ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] <[email protected]> On Behalf Of jjpurdum via groups.io Sent: Thursday, February 20, 2025 8:12 AM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] RF Board update. ? Mornin' Bill: ? I'd like to order one of the new RF boards. Is there a new schematic for the board? I didn't see it on your web site. ? Jack, W8TEE ? On Wednesday, February 19, 2025 at 10:48:23 PM EST, K9HZ <bill@...> wrote: ? ? BTW… the new stack of RF Boards here… have the following updates: ? 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. 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. 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. U21 pin 27 now not connected to anything. Holes behind the PE4302/PE4312 attenuators to make them easier to solder. ? This is not intended as a replacement for existing V12.6 RF boards… but rather convenience upgrades if you need a new RF board. ? 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. ? ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? -- Jack, W8TEE -- Jack, W8TEE

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#32826

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