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v3 PA specs

Michael Bales All Messages By This Member #116070 Does anyone know of a singular source that documents the specs, performance, etc. of the sbitx v3 PA stage? It appears to be a fairly flexible design and I was considering it as a potential candidate to put in front of a Lime sdr mini v2. There doesn't appear to be a significant support community for that particular sdr, but I certainly would like to get the most out of it that I can. As always, any input or suggestions are welcome! -- Mike - K8MCB?
Michael Bales All Messages By This Member #116071 Sorry, I should have been more specific. I'm looking for data for the entire Tx chain. -- Mike - K8MCB?
Evan Hand All Messages By This Member #116072 Hi Mike, ? Have you looked at the K9HZ amp that is part of the T41 project? /g/AmateurRadioBuilders/message/2721 ? or ? This might meet your needs. ? You could couple it with the LPF and T/R switch the sBitx uses. ? 73 Evan AC9TU
K9HZ All Messages By This Member #116075 开云体育 Yeah i bobbed the PAs out of all my BIT radios and use that 20W pa. ? Its got great specs and the semi-kit only cost about $20 plus shipping.? 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 3, 2025, at 11:37?AM, Evan Hand via groups.io <elhandjr@...> wrote: ? Hi Mike, ? Have you looked at the K9HZ amp that is part of the T41 project? /g/AmateurRadioBuilders/message/2721 ? or ? This might meet your needs. ? You could couple it with the LPF and T/R switch the sBitx uses. ? 73 Evan AC9TU
JJ - W9JES All Messages By This Member #116080
Michael Bales All Messages By This Member #116082 Okay, I'm interested. Where is the site to order from? -- Mike - K8MCB?
Michael Bales All Messages By This Member #116087 开云体育 Yes, I understand trying to keep the cost of components down, but after further research, and my own experiences with a few bitx products, why keep chasing down a design around a MOSFET not intended for RF and spend a few more dollars on something like the RD16HFF1, and be rid of the seemingly constant PA problems.... toggle quoted message Show quoted text From: [email protected] <[email protected]> on behalf of K9HZ <bill@...> Sent: Monday, March 3, 2025 12:03 PM To: [email protected] <[email protected]> Subject: Re: [BITX20] v3 PA specs ? Yeah i bobbed the PAs out of all my BIT radios and use that 20W pa. ? Its got great specs and the semi-kit only cost about $20 plus shipping.? 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@... ? On Mar 3, 2025, at 11:37?AM, Evan Hand via groups.io <elhandjr@...> wrote: ? Hi Mike, ? Have you looked at the K9HZ amp that is part of the T41 project? /g/AmateurRadioBuilders/message/2721 ? or ? This might meet your needs. ? You could couple it with the LPF and T/R switch the sBitx uses. ? 73 Evan AC9TU -- Mike - K8MCB?
K9HZ All Messages By This Member #116090 开云体育 Well thats the very reason i designed that little gem. ?It works without gain sag to 54 MHz… and you can short out or open the output 24/7 with no issues other than generating some heat. ?I gave Farhan a free board last FDIM but he seemingly isnt interested in such robust designs. ?In any case just email me Thursday if you want a semi-kit (returning from my contest station J62K currently). 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 3, 2025, at 8:02?PM, Michael Bales via groups.io <mikebales73@...> wrote: ? Yes, I understand trying to keep the cost of components down, but after further research, and my own experiences with a few bitx products, why keep chasing down a design around a MOSFET not intended for RF and spend a few more dollars on something like the RD16HFF1, and be rid of the seemingly constant PA problems.... From: [email protected] <[email protected]> on behalf of K9HZ <bill@...> Sent: Monday, March 3, 2025 12:03 PM To: [email protected] <[email protected]> Subject: Re: [BITX20] v3 PA specs ? Yeah i bobbed the PAs out of all my BIT radios and use that 20W pa. ? Its got great specs and the semi-kit only cost about $20 plus shipping.? 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@... ? On Mar 3, 2025, at 11:37?AM, Evan Hand via groups.io <elhandjr@...> wrote: ? Hi Mike, ? Have you looked at the K9HZ amp that is part of the T41 project? /g/AmateurRadioBuilders/message/2721 ? or ? This might meet your needs. ? You could couple it with the LPF and T/R switch the sBitx uses. ? 73 Evan AC9TU -- Mike - K8MCB?
Michael Bales All Messages By This Member #116091 开云体育 Absolutely! I definitely am down for a kit. I'll reach out Thurs. I'm glad you caught me on this. I love Farhans ideas, But like you mentioned, it makes no sense to me why you wouldn't go the route of a MUCH needed sturdier PA section. 73 K8MCB toggle quoted message Show quoted text From:[email protected] <[email protected]> on behalf of K9HZ <bill@...> Sent:?Monday, March 3, 2025 8:00 PM To:[email protected] <[email protected]> Cc:[email protected] <[email protected]> Subject:?Re: [BITX20] v3 PA specs ? Well thats the very reason i designed that little gem. ?It works without gain sag to 54 MHz… and you can short out or open the output 24/7 with no issues other than generating some heat. ?I gave Farhan a free board last FDIM but he seemingly isnt interested in such robust designs. ?In any case just email me Thursday if you want a semi-kit (returning from my contest station J62K currently). 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@... ? On Mar 3, 2025, at 8:02?PM, Michael Bales via groups.io <mikebales73@...> wrote: ? Yes, I understand trying to keep the cost of components down, but after further research, and my own experiences with a few bitx products, why keep chasing down a design around a MOSFET not intended for RF and spend a few more dollars on something like the RD16HFF1, and be rid of the seemingly constant PA problems.... From:[email protected] <[email protected]> on behalf of K9HZ <bill@...> Sent:?Monday, March 3, 2025 12:03 PM To:[email protected] <[email protected]> Subject:?Re: [BITX20] v3 PA specs ? Yeah i bobbed the PAs out of all my BIT radios and use that 20W pa. ? Its got great specs and the semi-kit only cost about $20 plus shipping.? 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@... ? On Mar 3, 2025, at 11:37?AM, Evan Hand via groups.io <elhandjr@...> wrote: ? Hi Mike, ? Have you looked at the K9HZ amp that is part of the T41 project? /g/AmateurRadioBuilders/message/2721 ? or ? This might meet your needs. ? You could couple it with the LPF and T/R switch the sBitx uses. ? 73 Evan AC9TU -- Mike - K8MCB? -- Mike - K8MCB?

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