Loris Interesting viewpoint, as I agree it is unusual to place AGC attenuation at the very front. I had not seen any loss measurements, and I imagine they vary with frequency. Perhaps they are not as

Hi Loris, There are a lot of newbies here and they just don't know. Don't be angry. Just help them alomng if they are actually open to help. I started learning about physics and electronics in the

Mestre David - N8DAH Meus parabens, é um sonho!!! Por que você quer vender tudo isto? --73's PY2PVB Rubens Kamimura GG49in07 Em ter., 17 de nov. de 2020 às 02:27, N8DAH <Dherron@...> escreveu:

Hi Bill ... I fully agree with you! What I am wondering is "why" this forum continues to call AGC a very vulgar "ATTENUATOR" even if more or less automatic. 73 Loris

Hi, Attenuating the signal at the receive antenna input is not gain control at all. Attenuation can reduce overwhelming signals that distort the receiver front end and make those very weak signals

It is not an AGC it is an antenna attenuator and good if you go to you will lose from 2 to 3 points S in reception, the system is not bypassable, even when turned off the MOSFET remains inserted in

The new QCX mini in the pipeline from QRPLabs is proposed to come with some simple circuit modifications built in to make it easy to turn the QCX mini into a ucx (there are some user supplied parts

The uSDX is a development effort that has several evolving designs, it's not a single product like the uBITX V6. One cool aspect of it is that it uses a highly efficient class E amp not only for CW,

From my tests and from the measurements made, it appears to me that the best known "AGC" modification module is a very bad "ATTENUATOR" placed in series with the receiving antenna! Although I have

Arv, the speaker detached and bounced around. Finals were bent and the AGC board was ripped out of the three pin connector. Hot on the trail, I bent the transistors back straight, did some soldering

Frank, KG9H What are the symptoms (what works and what does not work)? A picture of the damaged board might be interesting. Pinout for the off-board connections are in the assembly manual. Pinout for

I purchased a uBitz (4 I think) and it has a K5BCQ board in it. It bounced around during shipment and the board came apart. I think I can get it running. Just need the pin-out information,

Amp has been sold -- David N8DAH

Hi, It has been done over and over again from the time of earliest vacuum tube gear right up to recent days. It is a viable concept. See how you can use plug-in band changes on the newest

At some point I wonder if it would be possible to build QRP to moderate power TX stages at low enough cost, that rather than using relays or other filter switching methods for a multi band

The uSDX, as originally designed, is a single band radio. It only needs one LPF. One of the circuit board kits separates the LPF and a few other nearby components onto a separate PC board that plugs

The whole point of this project is not to compete with any other rig, but its a creative opportunity for tinkerers. Okay remember many of our partners on this list are outside of NA and don't likely

Some great suggestions and today I thought” what of i leave and rejoin” but figured it would be best to wait and see how the trouble shooting goes in case anyone else every has this issue. Arv ,

Doug I think it may come to that. I have one more trick to try though before giving up. Arv _._

Thank you Don. An e-mail has been sent.