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1 pill 1446 Switchable class ab/class c Switchable low pass filter... cutoff at aprox 50mhz LED power/modulation bar graph display meter made out of 7 leds..... display is adjustable inside the amp. Rx pre amp Automatic ssb Its made to be mounted under a radio.... the size is only 2 3/4...

YES.....excellent point to bring up. Don't use wire wound.

usually its 100 ohm resistor if this is a 4 pill. The idea is you have 1, 50 ohm input being split into2, 50 ohm outputs......2 x 50 ohms is 100ohms. The "balancing resistor" is usually double the input resistance or in this case....100ohms. Using 100 ohms will give you 50ohms on each side...

Don't get discouraged.... I think what everyone is pointing out is start small and basic. The ARRL handbook is indespensible. Theres alot of info in there. Have some fun and build some small rf amps or audio amps.... theres alot of guys that are into hobby electronics that taught...

The biggest concern would be running a heavy guage length to your trunk to power the main rf amp section.Certainly do-able though. You can extend out a control head easily enough..... I've seen certain types of wire have alot of resistance to it but I can't see any problem, except for maybey...

I just read through all this again...... I think you misunderstood what I was saying. Let me clarify ( months later LOL) If I used a single 1969 and hitting 50 watts peak from low carrier... its going to be overmodulated. The last part of my post says that I do a similar mod with a 1446 ( or...

Watch that Drake TVI filter too.... Some of them need to be grounded and can actually radiate. If your going to sheild anything... the first thing I would do ( provided your amps and radio are decently grounded) would be sheild the wire going to this sensor.... if it isnt a twisted pair, try...

Where is your shop located? Now we have a Lakeland radio shop and a Lakehead radio shop on the forum.LOL I'm at Lakehead Communications in Canada. Welcome to the forum.

Are you running 2 hot antennas or is the rear dual coil just there for a reflector (bounce back)? I can't see any coax going to the rear antenna so it doesn't look like a 2 hot setup. If it is a 2 hot setup, are you running them in phase or out of phase? It sure is an extreme looking...

I don't think anyone asked this yet........ what is your match like? It sounds like the static is fairly constant like its a poor rx problem. A 4 foot Firestick is a really poor rxing antenna to begin with. From what I understand where the antenna is mounted, part of the antenna is below the...

The stuff I wanted to hear wasn't really intelligable..... more like modulated tones and waveforms tx'ed from a High Altitude Aurora Research station in Alaska. I was kinda interested in monitoring some of their transmissions and different "types" of transmissions. I can pick up some of the...

If you have a high swr with the amp on or off, I would speculate that the problem is between the amp input and the relay... or somewhere around that relay. Its strange your getting high reflect even with the amp off and relay disingaged.... With the amp off, the signal should travel from the...

Thats pretty low freq stuff..... I can see the advantage and why the interest.... with such a long wavelegth and the funky propagation thats somehwhat possible with VLF freqs you could do alot of things. At one time I did want to build (or buy) a VLF reciever because I had an interested in...

Its hard to find info on those old TRW transistors..... expect about 80watts out of the pair( this depends on how its driven) . Its actually a decent amp..... there are many of them still working and kicking around. I seem to run into alot of them up here in Canada. I have a few of them kicking...

Make sure you got tx audio..... the problem with those radios is they inherently run hot..... especially the audio IC. Make sure thats good. Sounds like you did that already. I've had a problem with tx/rx switching in one.... Just make sure your seeing rx on the signal meter so you know its...

Anyone have a data sheet on them? Its strange they would change the board layout just for a new audio IC. I would have thought they would have found a sub thats more or less the same IC insted of something totally different. I most likly won't see one up here for a little while yet.... it...

I can't tell you exactly where the problem is.... I've never worked on one of these. But if they are similar to other ssb radios the rf final might have 2 different voltages. On some ssb radios the final will runn off of 8 volts in am mode and 12 volts in ssb mode. It might not be the case with...

No one had one there either.... thanks anyways. I ended up getting ahold of the Canadian Zetron rep and got him to send us a service manual. Thanks again