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First you need to know what your powering. Is it class AB1, C etc....... Then determine what its peak output is. Lets say its 1000 watts for an easy number. Most TRUE AB1 amplifiers are around 60% efficient. Most class C's are 70-75%. What this means is, that a class AB1 amplifier will...

If your seeing an increase in current with a decrease in Po at 27Mhz, then the tank circuit should be redone as it is not loading for that freq....as you already stated. C1 looks fine, but C2 should have at least double the capacitance. You could try shorting out a few turns of L1. Do...

To really answer your question, Can you give us an idea or pic of what is there? Alot of those amplifiers like the Gates, collins and henrys, had enough tuning range to tune everything between 1.6 and 30 Mhz. I dont understand why people say they are "optimizing" for a specific band. If it tunes...

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I HATE HATE HATE the browning squeal box, Browning Pings, Browning in general!!!!! Who puts 60VAC on a Mic???????????????

If you truly want a clean amplifier, Stay away from ANY CB amplifier or and any amplifier using sweep tubes!! Even the sweep tube amps from reputable manufacturers like the Ameritron AL-84 and TEN TEC Centaur. Although their pi network does limit out of band presence, the in band still suffers...

Not to mention, If you are hearing them in the CW portion of the 10m band.....They are likely WAYYY over modulated and splattering. That will also make them sound muffled or distorted.

In the fourth picture, There are (2) 3 legged transistors. one is for the key up, the other is the rx amp. Your pictures are pretty blurry, so I can tell which one is the rx amp. The easiest way to tell is to desolder and lift one leg of either transtistor. If the amp stops keying, then the...

I have a few Pieces Id like to trade or Sell What I want............TS-480HX, TS 2000 any model, THD72a, mobile screwdriver 10-80meter What I have, Make offer if you want to buy straight out, I just found my camera and will post pics asap. Icom 746 w/ mic and paperwork 9 out of 10...

I used to work for Emergency Services in Wicomico County. I repaired and programmed, MTS MCS 1k, 2k, 3k XTS XTL 1k-5k and APX 6k, 7x I can tell you that the APX programming software is far more advanced and user friendly. The previous models all used the same style of programming. If your...

You must have some good eyes OM. For me the video was grainy/fuzzy. I agree about the blocking cap rating. I bet hes got 8k-9k volts supplying the tube. The 3cx3000f7 I have in the works for 10-160 is going to run around 5100volts.

I have seen a couple wizard boxes, and from the looks of things, his design has not changed. I dont see a choke to ground after the tank circuit. So, if the DC blocking capacitor shorts, B+ will go straight to the coax and antenna. That will kill anyone who touches either!

Well even though I chimed in awhile back, I must add some new information. I have aquired a kenwood ts 480HX and am astounded at the AM in this rig. Right out of the box I show 100% modulation 50 watt carrier with 200-210 watt peaks and avg is around 110-120 watts.All seen on my IFR1600 and...

How are the birdies? Any noise on any bands 10-160m?

I think you need to decide first if you want or can run 220. If not, find an amp that can run 110v. There are many cheaper amps on the market that run 80-10m if you dont need 160. If you can run 220V, I recommend the AL572B amplifier on the used market. There are several on QTH rite now for...

You can lower the am carrier. It is done in the service menu. Keep in mind, the rig will still modulate up to what it would normally, So be sure to set the proc and gain so you dont overdrive the audio. I dont remember off hand, but I know you short out two pins in the data connecter and hold...