开云体育

Hi. I purchased a set of boards from Justin, AI6YM. I working on putting the RF module/board. Looking at the schematic, it reads that R35 and R37 are supposed to be 3.3KΩ. Looking at the board, which has all the SMT populated, I noticed the 3.3k Ω resistors have 0Ω soldered on top of them. Was this a mistake, or or should thy be 0Ω? R40 and R42 have the 0Ω resistors in place. Thank you for your time. Duane - K5CA

All: Greg pointed out that Amazon (finally) has changed the ad on their page for our updated DSP book: Note that the publication date is April 16, 2025. The bad news is that we lost over 150 reviews where most (85%) were 5 Star reviews. That will hurt as that's a good rating for a technical book. So, if you like the book, please take the time to write a review. If you don't like the book, go ahead and write a review...just don't send it in! Jack, W8TEE -- Jack, W8TEE

Al and I released an updated version of the book, but we didn't feel it was worth calling it a new edition. The problem is I've placed two different orders and was sent the wrong printing. That has been fixed now, even though the ad has an April 18, 2024 for the release. There are two obvious differences that you can use to tell if you're ordering the right edition. First, the T41 on the cover should be black, as shown below. Second, and more important, if you click on the Read Sample button below the book image and scroll down, you should see that it has A new chapter (Chapter 20 on Calibration). That chapter is new with the update and expands upon the information that was in Appendix C on earlier editions. Jack, W8TEE -- Jack, W8TEE

All: Recent there was a negative post about the V11 boards and the T41 from 4SQRP. I got this private email from Neville Marr, ZL2BNE, who has been following the T41 from its inception. He has a T41 from 4SQRP and speaks positively about it. I asked him if I could re-post his email because I know there are a lot of 4SQRP radios out there and he wants everyone to know that it is a good radio that he uses on a regular basis. I, too, have a 4SQRP T41 and it is a very good radio. He gave me his okay to post his email. Jack, W8TEE =============== Hi Jack, We haven’t communicated in quite some time but I continue to check-in on the softwarecontrolledhamradio group from time to time. I’ve recently reviewed postings and one took my attention … for the wrong reasons. /g/SoftwareControlledHamRadio/message/33358 The post was pretty disparaging of the V11 receiver performance, among other things calling it an intolerable toy radio. I see no point in giving such posts oxygen on the forum but I felt a need to let you know my experience is totally different. You will recall I was an early adopter of the T41 project, I had V10 boards made and did my own thing. You will also recall I was quite critical of some aspects of the project. I always had issues with the transmit side of my V10 T41 but never the receive side. The receiver worked from day one. In my case I don’t hear any noise on rx with a dummy load connected. I can easily hear my Marconi sig gen set as low as it will go at -127dBm. It’s a very good receiver. Over time I made a number of hardware changes to my QSE, I built two filters of my own design, one follows the QSE the other follows the PA. Final transmit change is adopting the K9HZ PA. Today my radio works faultlessly using Greg’s T41EEE. I got everything where I wanted and started logging contacts in August 2023. I’m not much of an operator but do put my creations on the air. I’ve just interrogated my log to discover I’ve logged exactly 100 contacts using my T41. Quite a cool number. I’ve had the T41 on the air more times than that, mainly local nets, but all the same 100 in the log. Below is a breakdown of the 100. I’ve worked every continent except Africia (Africia is notoriously difficult to work from NZ, South Africia is the rarest DX from NZ). So thank you for getting the T41 up and running. I am a little sad that V10/11 got supplanted by V12 because V10/11 is a very good radio. I do hope people can get V12 to a place where V12 T41 are on the air too. My T41 is my go-to radio, my daily runner. Cheers, Neville ZL2BNE -- Jack, W8TEE

For those of you in the UK/EU… Andy Rutter, G8HCK, has graciously agreed to distribute T41/ K9HZ/ K9HZ-KI3P boards and kits there. I’ll attempt to ship him a load of stuff and he will make arrangements to ship to you. In the short term, you should give him your order and at a time in the near future… he can forward the combined order for me to ship to him. You can contact him at: arutter@... 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: www.VillaGrandPiton.com Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. email: bill@...

I have output in CW mode, but 0 in SSB. Even doing TX IQ with 750hz tone or 2 tone TX 0 output. FW is the 66.9 Tim W4YN

“I have mentioned to Bill and Oliver that I would like to see a small PCB hold the 4 connectors (mic, PTT, headphones, and key) just because the current direct wiring makes the front look like a rat's nest. It's purely aesthetics for me and something most people will never see. “ I’ve been working on this for a while but have tied it to an overall audio system. Here’s what I have on the list (Comments welcome): For AUDIO OUTPUT: Stereo output for RX1 and RX2. Separate Line output with variable gain (TDA1308, TDA7050, TDA7313) Separate Headphone output variable gain/ headphone amp (LM4811, TPA6120, TDA7050, TDA7313). Speaker output with on-off and variable gain. 3+W amp for speaker output (TDA2030, LM4950). For AUDIO OUTPUT: 2x MIC input (front and back panel (TDA7309) Line Input (TDA7309) Connection boards: FRONT and BACK: Front: i. AUDIO: Mic, PTT in, Phones, ii. Key? iii. On/off Back: i. AUDIO: Mic, Line in, Line out, speaker (internal). ii. Key iii. PTT IN iv. KEY OUT (from LPF) v. ACC Connector (BAND0-BAND3 from LPF Inverted). vi. USB2 vii. RS232 This is all sitting in a box here waiting to proto it up and try. 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: www.VillaGrandPiton.com Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. email: bill@...