开云体育

RF Board update.

K9HZ All Messages By This Member #6091 开云体育 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@... ? ?
Albert Peter All Messages By This Member #6093 开云体育 Bill, Did you get my note about changes to the component values for the SSB Exciter chain on the RF board? If not , I will re-send it.? These changes enable the flat response and lower adjacent channel images. Al AC8GY toggle quoted message Show quoted text From: [email protected] <[email protected]> on behalf of K9HZ via groups.io <bill@...> Sent: Wednesday, February 19, 2025 10:48 PM To: [email protected] <[email protected]>; [email protected] <[email protected]> Subject: [AmateurRadioBuilders] RF Board update. ? 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@... ? ?
Doug W All Messages By This Member #6127 On Wed, Feb 19, 2025 at 09:48 PM, K9HZ wrote: Changed U106 to a AD8599, and U107 to a OPA2209 Will you be updating the BOM for your new RF board?? I was going to add the new op amps to an order I'm working on and I know just enough to order the wrong variations. ?
K9HZ All Messages By This Member #6128 开云体育 Same RF board. ?Just changed the two op amps for lower noise parts. ? You can still use the original parts of you want… and the bom was updated a couple of months ago. ? Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com email:??bill@... ? toggle quoted message Show quoted text On Mar 1, 2025, at 12:45?PM, Doug W via groups.io <dougwilner@...> wrote: ? On Wed, Feb 19, 2025 at 09:48 PM, K9HZ wrote: Changed U106 to a AD8599, and U107 to a OPA2209 Will you be updating the BOM for your new RF board?? I was going to add the new op amps to an order I'm working on and I know just enough to order the wrong variations. ?
Phil Taylor All Messages By This Member #6129 Albert ? Trying to clarify what your mods are.The following in reference to your changes? ? Change the following capacitors to 20pF - C33, C37, C46, and C54 Replace capacitors C35, C48 to 0 Ohm resistors (eg jumpers).? Just mount them on top of the existing caps. Regards? Phil VK2KKZ toggle quoted message Show quoted text On Thu, Feb 20, 2025 at 09:38 PM, Albert Peter wrote: Bill, Did you get my note about changes to the component values for the SSB Exciter chain on the RF board? If not , I will re-send it.? These changes enable the flat response and lower adjacent channel images. Al AC8GY ?
Doug W All Messages By This Member #6130 On Sat, Mar 1, 2025 at 11:07 AM, K9HZ wrote: You can still use the original parts of you want… That leads me to the answer for what I was trying to figure out.? I could have phrased my question better.? The OPA2209 is available in two packages.? Looks like everything else is 8SOIC so I now realize the answer was right there. ? ?
K9HZ All Messages By This Member #6131 开云体育 You have what you are asking for. ? Dr.?William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton - J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com email:??bill@... ? toggle quoted message Show quoted text On Mar 1, 2025, at 9:19?PM, Phil Taylor via groups.io <philbyt1@...> wrote: ? Albert ? Trying to clarify what your mods are.The following in reference to your changes? ? Change the following capacitors to 20pF - C33, C37, C46, and C54 Replace capacitors C35, C48 to 0 Ohm resistors (eg jumpers).? Just mount them on top of the existing caps. Regards? Phil VK2KKZ On Thu, Feb 20, 2025 at 09:38 PM, Albert Peter wrote: Bill, Did you get my note about changes to the component values for the SSB Exciter chain on the RF board? If not , I will re-send it.? These changes enable the flat response and lower adjacent channel images. Al AC8GY ?
Jerry All Messages By This Member #6144 My March Madness is trying to get this board started So, I am just checking these parts before I place an order to update the parts for the V12 RF Board. I don't see these updated in the RF BOM yet, just the schematic?? Is this the current BOM?? / / / T41_RF_Board_BOM_V012.6_09-28-24.pdf ? ? OPA2209AIDR Mouser 595-OPA2209AIDR, AD8599ARZ-, Mouser 584-AD8599ARZ-R, ? ? ? ? ? ? 12065A200JAT4A 20pf for C35 and 46,? ? Mouser 581-12065A200JAT4A,? ?(I just see this mentioned above) ? ? ? ? ? ? ?Jerry N? KD4TNX
K9HZ All Messages By This Member #6145 开云体育 Try this:? ? ? 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 Jerry via groups.io Sent: Friday, March 7, 2025 2:07 PM To: [email protected] Subject: Re: [AmateurRadioBuilders] RF Board update. ? My March Madness is trying to get this board started So, I am just checking these parts before I place an order to update the parts for the V12 RF Board. I don't see these updated in the RF BOM yet, just the schematic?? Is this the current BOM?? / / / T41_RF_Board_BOM_V012.6_09-28-24.pdf 4.????????????? ? ? 1.????????????? OPA2209AIDR Mouser 595-OPA2209AIDR, 2.????????????? ? 1.????????????? AD8599ARZ-, Mouser 584-AD8599ARZ-R, 2.????????????? ? 3.????????????? ? 4.????????????? ? 5.????????????? ? 5.????????????? ? 1.????????????? ? 2.????????????? 12065A200JAT4A 20pf for C35 and 46,? 3.????????????? ? 4.????????????? Mouser 581-12065A200JAT4A,? ?(I just see this mentioned above) 5.????????????? ? ·??????????????? ? ? ? ? ? ?Jerry N? KD4TNX
Jerry All Messages By This Member #6146 Bill, thanks for the RF Board BOM update,? Jerry N KD4TNX?

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