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i was excited to put together my Ubitx today after finally getting a roll of .5 mm solder yesterday. I’m not an expert by any means in electronics assembly - I’d say that my proficiency is

I really could use a good reference for a long lasting replacement relay for the uBitix transimit/receive relay, what say you ?

John, If you are looking at the 5" Nextion files under AJ6CU, then I was probably the last person to touch them. Unfortunately, I couldn't find any of the graphic files either when I made all my mods

As John, K0JD pointed out in post /g/BITX20/message/70894 the TenTec Argosy was using rectified RF to create the high DC voltage required for a PIN diode T/R switch.? As proposed in

Correction: Second paragraph here mentions it plus a couple other options with regard to TR switches: /g/BITX20/message/39746 Jerry, KE7ER

Tom, You need to poke around a bit further on qrpkits.com https://www.qrpkits.com/bitx20a.html Schematic is in that first assembly manual listed. Second paragraph here mentions it plus a couple other

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Same here Tom. I lived near Huntsville when I was first licensed, WN4CCA. I sent off for a NASA technical bulletin – “Telemetry”. Latest in high tech. Interviewed at IBM Huntsville, they showed

Eric, i have a couple of display protection boards left when you do your JackAl display de n2aie vince

I would appreciate assistance with the 40 please. After triple checking connections, I fired up. The display was blocks which adjusted with the pot on the Rad board. It was drawing 140ma on idle

Cool site. Fun to look once again, in the context of the era of Heathkit kits and the early space race technology, the electronic designs I poured over learning electronics design. Then think of now,

Hi, I found some reviews of the bitx20a. Did not find a schematic, yet. However, I found this CW transceiver designed by Dan Tayloe that has a couple of mosfets to cut off the RF to the receiver

https://www.vintage-radio.info/heathkit/

If you guys can locate, look for the bitx20a manual. It has a Tayloe T/R switching system. The other mod will be to keep the lpf relays powered up. The heaviest lifting is what we can do to avoid the

Interesting, I was looking around at sites that featured old Heathkit photos and product information. Found this link. Looks like someone is reviving Heathkit in Santa Cruz California. Maybe a

In my experience, yes. I haven't used Eneloops, but IKEA Ladda (supposedly rebadged Eneloops) and Amazon rechargeable AA will power it for a short time, but quickly go too low, resulting in flickering

Lets see, the ubitx was advanced because many inexpensive rigs only do cw. Funny thing I mostly have done cw with the ubitx, but the early qsos were ssb. I imagine somewhere there is a ubitx that does

Hi Rob, No problems. Ok for the regulator, that should work just fine. Regarding the place to insert the Teensy, here are my thoughts: If you have an AGC then before the volume control as you

My new site adress : https://www.qsl.net/py2ohh/ the old ?was hacked ... and I lost the links ... 73 from py2ohh miguel

Can you verify that after you get the message that the setting has been saved that you completely power down the Raduino (disconnect any USB cable and power down the board)? The new value does not