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the NPC / swing mod will work for the anytone quad 6, Stryker 955, Stryker 655, the anytone quad 5 and quad 5 end, it's all the same circuit. Cathode of 1N4148 signal diode to center pin of the a.m. regulator. I add a 47 ohm 2 watt resistor for slightly more peak, you can use up to a hundred ohm...

I believe the only reason people would tell you to swap out the mosfets for different ones are because they were running it with the 20 watt dead key out of the box. Foolish of anytone and striker to have out-of-the-box dead keys that high. I recommend no more than a 7 watt dead key on maximum...

The NPC RC mod is as follows. 1N 4148 signal diode, cathode to center leg of AM regulator. Use a 50 to 100 ohm 1 watt resistor attached to the anode, other end of resistor t0 positive pin of capacitor shown in picture. This is identical to the stryker 955 and stryker 655 n p c r c AKA swing mod...

1n4148, cathode 2 center leg of am regulator, rearmost three-legged chip heatsink on the chassis. 1 in 4148 signal diode, cathode to center leg of a m regulator which is the rearmost three-leg IC heatsink to the chassis. Add a 47 ohm 1/2 watt resistor in series to the anode, solder other end of...

I will look have the schematics tomorrow, should be simply changing one or two capacitors.

Shoot me an email and I'll walk you through the mod for the 980 SSB

NPC RC mod available, did it today on a Cobra 200. 6 Watt dead key swings to 30 bird on low-power peak of 105, 20 watt dead key swings to 60 bird on high-power 135 peak. Pretty easy to keep a clean signal as well. Any interest anymore in a mod for this radio like this?

I would be happy to provide pictures and the way I tune them up. Email me at tiny@tinyscbshop.com. The npc\rc modification and tune is similar to the ranger boards. Be forewarned that the proper mod is with a one end 9:14 or 1 in 4148 signal tired and a 100 ohm 2-watt resistor. While the mod can...

As a shop owner and technician vthe AT quad 6 is hands-down the best 10 meter mobile I think dollar per watt there is. It is basically a smaller version of the striker 955 board with very few differences. The radio is an expensive and quite a performer. As mentioned in a previous posting, FM...

If you did not notice, there is a 100 ohm to Watt resistor in series with the wire jumpring from VR4 to the solder point on the other side of the board. Of the thousands of 29 and 25 is I've done this mod to not once has the VR burned up. Please read the full modification.

The quad six is an outstanding radio indeed. with only a few simple mods and the equipment to view the waveform with etc, a powerhouse of a radio bodacious audio and excellent carrier development and peak output. 1 1/2 watts to 11 Watts average on low 4 Watt 224 watt high average, 80 + p e p...

Retro CB Guy, shoot me a PM please

I've had no issues with the AD 203 and I've been installing them for years. Currently replacing the 2 transistor PA in a Saturn Turbo. Seeing 123 pep currently, probably a bit more before it's all done. Just follow the directions and ensure the radio it is going into has a 1-2 watt dead key...

Thank you for the info.

As stated previously, adding the 100 ohm resistor prevents the VR from burning. I find no difference on the scope or spectrum analyzer doing this mod or the "mod kit" cap+resistor mod. I find it to be a cleaner modification and it also allows for easily setting the desired deadkey without...

Call it what you will, if it caught fire, then you obviously did something to cause it. A 5/8 wave will out perform a 1/2 wave any day of the week all things being equal. Caught on fire....Trucker tale where the driver starts the story off by saying; "You aint gonna believe this sh@t!"....

Still wish I had a brand new ABS 1600, worked the best of all antennas I've run. I'm running a Sirio 827 now, and so far, it's holding up very well, having gone through some high winds and currently icy conditions. 1.2.1 across the CB band. BUT..... I still like that damn ol' ABS 1600...call...

I purchased an ABS 1600 when they first came out back in the 90's. It served me well for several years, far outclassed and out performed the Antron 99 I had previously. Had the base of the ABS 1600 36' in the air on a well grounded push up pole. SWR of 1.3.1 across the band. Tried out an...

Thanks for your input! True,it only is similar to the NPC-RC mod done to radios with the AM regulator instead of a transformer. Using the 100 Ohm resistor keeps VR4 from cooking off, I've not had one come back that burned up.

Works on all cobra 29 radios, ltd and up. After a complete tune up/upgraded final/mosfet/etc, See the attached PDF. this mod will give you a variable dead key using VR4, the modulation adjustment VR. From 0-max dead key. Clean and easily changed up to use the RF gain on the face is desired...