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Date
Re: uBITX drive level.. #ubitx
Mr Kang has published his fix for low drive on his excellent blog: http://smallwonderqrp.blogspot.se/2017/11/?m=1 73 de SM5NNO
By Anders Landgren · #41251 ·
Re: uBITX AGC - Adafruit TPA2016, A Success! #ubitx
Which 2 boards?? I know the one is the TAP2016.? What's the other? 73, Michael KM4OLT
By Michael Monteith · #41250 ·
Re: RD16HHF1 in the uBITX #ubitx
Curious. Farhan recommends 100ma of bias through each uBitx FET, same as the Bitx40: ? ?http://www.hfsignals.com/index.php/ubitx-tuneup/ WA2EBY recommends 10ma in part2 of his writeup. It does make
By Jerry Gaffke · #41249 ·
Re: Case
Me too Pat AA4PG http://www.cahabatechnology.com ________________________________ Sent: Monday, February 5, 2018 7:24:03 AM To: [email protected] Subject: Re: [BITX20] Case I agree: [Inline
By pat griffin · #41248 ·
Re: uBITX AGC - Adafruit TPA2016, A Success! #ubitx
Nick Did u post some code or did I miss your posting 73 Art -N2AJO
By Art N2AJO · #41247 ·
Re: Anyone (US Only for now) need a uBITX Raduino repaired? #ubitx
Hopefully, I won't need your service, Jim, but it's great to hear that you're willing to provide it! -- 73 de W5NNH
By John Kemker <kemkerj3@...> · #41246 ·
Re: uBITX AGC - Adafruit TPA2016, A Success! #ubitx
It¡¯s a pretty complex device?Data Sheet ( https://cdn-shop.adafruit.com/datasheets/TPA2016D2.pdf ) i guess somebody could come up with device configuration for menu settings: AGC fast, slow,
By bobolink · #41245 ·
Re: Case
I agree: Jack, W8TEE To: [email protected] Sent: Monday, February 5, 2018 5:58 AM Subject: Re: [BITX20] Case I always enjoy seeing how others have built their BitX's and thought I'd point out
By Jack Purdum <jjpurdum@...> · #41244 ·
Re: Second batch of uBITX shipping? #ubitx
You couldn't make it up - My ubitx took just 24 hours to get from India to Germany with DHL and has now sat for 3 days (so far) at the customs in Leipzig and they are refusing to release it without a
By dj0hf · #41243 ·
Re: Case
I always enjoy seeing how others have built their BitX's and thought I'd point out some ideas I used with mine that others might find useful. For example: 1. Almost everyone places their tuning
By Vic WA4THR · #41242 ·
Re: uBITX drive level.. #ubitx
Hi? Of course "decrease" means a smaller resistance.... The original R63 is 47ohms. I cannot find 11ohms but 10 or 12 ohms in my supply.... / Tilman
By Tilman, SM0JZT · #41241 ·
Re: LTSpice simulation of uBitx Power Amp
Dunno about that. I always design my LP filters at 50:50 ohms in and out... and my PA transformers are 50 ohms at the output. I don't know why you would want to make the LP filter a transform
By K9HZ · #41240 ·
Re: LTSpice simulation of uBitx Power Amp
I have the .model for the RD series transistors if you care to run that too. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch ¨C
By K9HZ · #41239 ·
Re: RD16HHF1 in the uBITX #ubitx
BTW the BLF series was designed for this very thing. Peak RF Voltage breakdown is also an issue. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big
By K9HZ · #41238 ·
Re: RD16HHF1 in the uBITX #ubitx
Well thats a loaded question. Reflected power just means that the transistor must dissipate the power. So at infinity SWR, the transistor(s) must be capable of dissipating all of it. A 50 watt
By K9HZ · #41237 ·
Troubleshooting the #ubitx
As others, I am facing problems regarding tx on my #ubitx First test I did without case showed no power on meter. I did not give importance to this then as I thought it was just an old uncalibrated
By C¨¦sar EA3IAV <Cesarleon@...> · #41236 ·
Re: Case
Dear All, Inviting you all to have a look on uBitx Case Home brewed. http://vu3psz.blogspot.in/2018/02/ubitx-home-brewed-enclosure.html
By Sajeesh Pilakkat <sajeeshpilakkat@...> · #41235 ·
Re: RD16HHF1 in the uBITX #ubitx
Nope. Close enough. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois Owner ¨C Operator Villa Grand Piton
By K9HZ · #41234 ·
Re: RD16HHF1 in the uBITX #ubitx
https://www.radio-kits.co.uk/radio-related/20W_PA/20W_HF_PA_Construction_V2-1.pdf
By Lawrence Galea · #41233 ·
Re: RD16HHF1 in the uBITX #ubitx
Yep, correct. I'm still here :) View this link?( https://youtu.be/pP1kXFidNTw ) for the receiver in action so far. I've been messing around with RD16HHF1 and it looks promising. Due to lack of time
By Alex - PA1FOX · #41232 ·