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You can even attach the 3000mA 12 V Talentcell to the top of the QMX+ enclosure (or bottom if you are using flip up front feet))? with double sided tape and use a small cable between the two power

The LM2940CT-12 seems to work fine on my 12v rig. Could be some QMX's built for 9v may want more than 1 Amp. The LM2940CT-12 is around a dollar for one piece, higher currents cost more. Here's a

Dave, These relatively smaller modules all use a common battery charge/battery protection controller IC: https://www.ablic.com/en/doc/datasheet/battery_protection/S8254A_E.pdf This is the datasheet of

Did a quick search, seems the spelling is best made a little different: A “ditty bopper” was a slang term for a Morse code intercept operator, MOS 05H in the Army. Most were assigned to the ASA

Hi Cal, I would like to add my 2 cents with regard to your purchases so far. ?It would make sense to me if all the parts you have purchased so far-to get to where you need to be with this project- be

very reasonable at $8.99 I switched to Amazon Canada to find surprise $38.37

I've borrowed a signal analyser and what this shows me on the antenna on the 20m band in the diagnostics mode is a signal at 14.061 Mhz when receiving and 14.077 when transmitting.? I suppose the

Hi Barb, I agree, the high power BMS is an overkill. The lower power versions don’t have any balance circuitry for whatever reason. Keeping things simple is probably a good idea. I guess it’s all

David, These work great too! https://www.amazon.com/dp/B0BTYL55XQ?ref=ppx_pop_dt_b_product_details&th=1 Rick K8BMA

Hi John Yes, still available. Maybe you could phone me to discuss or send me an email. My email address seems to have been truncated on my post...it's correct on my QRZ.com page. 73 Steve G4EDG 07981

Hello, I'm back again and this time I have good news, I think I finally fixed everything. Once connected to the terminal app, touching the board or "bending" it slightly changed the voltage, so as you

I normally use one of my many, very good linear lab supplies. I was readying a 2nd QMX I bought to lend to an old USAF diddybopper living in a memory care facility. An adjustable lab supply was not a

Hi Sardar and All, TP4056 is only a charger. using 3 of them can charge but you won’t have balancing which will eventually overcharge cells and damage batteries. These bms boards are pretty good in

Hi Sardar, I suspect any solution using switching converters is going to generate RFI. Anyway, a few thoughts below. 73, Dave General I am not so sure that adding switching regulator devices in the

Hi Sardar, from my point of view the current solution with the balancer board is good enough. With normal 12V power supply during operation there should be no issue. My concern is the life power at

Is still available I’m keen to use 80m for the first time 73 John M7FZC

I've been trying the hardware diagnostics with no BS170s installed and all the Rx tests behave as if there's no test signal input. The Receiver is working.? I connected an antenna and can hear and

Ja, So, based on your scans I would immediately suspect the soldering of the T501 transformer, and your LPF toroids. Maybe also the winding of T501. -- 73, Dan - W2DLC

I use these: https://amzn.to/3UZL1Za -- John AE5X https://ae5x.blogspot.com

Dear Stan, Please give me some advice. I tried sequentially inputting signals from 7Mhz to 21Mhz to My QMX using Tiny SA. I was able to receive everything. So I think replacing PCM1804 should be