Search results

I've got the LR one and the LR6. Both have the preamp going thru the tube output circuit. What I have found is since the output tubes already have the narrow band tuned tank circuit, and the preamp uses this on the receive side, it makes a great low noise preamp. The best I have ever had. Just...

It has good Tx, but on a crowded channel (I'm in Detroit) the receive is unbearable. Attack of the Birdies!!! I still contend that single conversion just sucks for AM, period.

Maco Though they have similar voltage ratings, seems that the further you go down in dissipation, the quicker they will flashover and kill the tubes, even with less drive and power out.

arf 2001 I did sell my ARF 2001 export demonstrator (everything has a price) lol. After being ARF-less for a while, I bought another with the frequency counter and has original box. It works except the counter just free-runs. Anyone have any manuals or schematics for the COUNTER? Also it has...

JOHN BOY I have one. A 4 tube 4cx250b 2 piece model. Had read good things about them, but in reality, a real POS. I will just ditto everything the other poster said about it. Another poster said that he would just buy a HAM hi-power amp. Hmmmm maybe a henry 8k or alpha 77sx? but amps like...

arf compressor The arf 2001 radio uses a feedback servo loop and solid state transformerless modulator to achieve 18 db's of rf corrected compression. Browning Raven and a couple other tube radios I cannot think of right now used a "opto-compressor" circuit. Basically a light connected...

arf Hi Mike thanks for the threads, nice reading. I have a couple questions and gripes. First, I have 1 ARF left. It has a Plexiglas see-thru top and an old sticker in the back that says "factory demonstrator export. not for sale in USA". It also has 3 channel switches hidden in the handle and...

ARF 2001 I have owned 5 I have owned 5 of these over the years. 1st one I saw was at Wawasee electronics (Black Cat) about 25 years ago. It was about the prettiest radio I had ever seen. With features like SAM (servo amplitude modulation) and Amsil (Am Silence) I had to have 1. These...