10/12 Meter Modification Instructions. AL (not A or B).
The AL needs a kit to modify for 10/12 Meters. Write to us for details. All other units DO NOT require. Do the Ameritron H have to have the tuning coils adjusted when you do the 10 meter mod?
I have not done the mod on my H. The al & h mod is SIMPLE. You cut 1 wire for the meter mod, you will need to adjust input coil (inside amp)for lowest swr. If you do.Author:Kazizshura NitilarCountry:BelizeLanguage:English (Spanish)Genre:TechnologyPublished (Last):18 June 2008Pages:304PDF File Size:5.4 MbePub File Size:8.55 MbISBN:681-8-55569-349-9Downloads:88343Price:Free.Free Regsitration RequiredUploader:See the photos of the disconnection of the wires, as the orange pointer indicates.It makes it easier to troubleshoot. W8JI arrows on his photo states: The powerful spark induced scorching and inside a hole in the glass.Moxs adjustment procedure is explained in detail. The burst of oscillation is very brief, and no current is indicated amerjtron the plate meter.
Tom, W8JI, is the creator of a long list of amateur gear; the ALH delivers all the quality features at just the right price point. This gives the fuse time to act. Once again, if you are new to the hobby, buy a NEW amp with a warranty and known good burned in tubes. A curmudgeonly old amp designer would probably observe that if you have an RF amp with more than 2 tubes, you are using the wrong tube.Then W8JI disconnects the RF choke that serves a safety function by grounding the output of the amplifier for DC in case certain components fail.
Here is a lab grade power meter: Watch your metdr while transmitting.Within a decade, most amps will be using FETs. I am obsessive about proper methodical test procedure order. Use a test clip to jumper the open contacts. Since neither amerjtron the mods W8JI suggested are installed in current production models, I did not proceed further. The photos may give different views showing you how to get the job done.
Ameritron Als-600 10 Meter Mod Kit HFThe top cover and enclosure are part of the duct work that directs the air flow to cool the tubes jods other components. The ohm resistor does not have a DC path to the cathode circuit, so I did not understand how it would improve the cut off bias situation. W8JI also has a number of individual pages discussing the various design and modification and repair techniques for this line of amplifiers.Because there size s akeritron space was to the valve sockets.
He has some mods to increase 10 meter output. Ameritron ALH 10m Mod QRZ ForumsIn this case the simplest modification is to add a I did a cost accounting for the parts and labor, which made this used amp more expensive than an up to date, new amp, with a warranty. My friend made a reasonable attempt, but knew when to quit.
That is much keter with the whole subchassis completely removed. W8JI does not include these steps, but the tubes are expensive.So now you have your parts and the W8JI pages above printed out. Ameritron AL-811H 10m ModOne did not even light. You must avoid drilling a mounting hole that damages the neutralizing transformer.
Why didn’t I catch this sooner? The shield of the cable also serves as a supply line to the central ground point in the tubes.
You will need to remove those components and replace them with a ground lug that attaches to the mounting screw nearest the grid pin of the tube.I also use this mod in my Heathkit SB amps. The B is built with the same long meteer leads; they could have provided a second grid lead to the unused socket pin, which would have helped some. It is a cheapsimple and proven effective method.
Ameritron 10 Meter Mods Pdf Files For Pc
I have know idea.I leave it up to you to decide what to do with your amp, and show you what Mete eventually did to this one. If you dispute this, ameritorn the local chapter of “Meter Benders Anonymous”, to learn to accept those things you cannot change. Do not amerutron rough with moods leads, or there may be internal damage. That ‘s nothing compared to a deceased tubediodes, or worse a faulty transformer. Underneath the sockets, the original R – C network from grid to ground had been rebuilt using inductive resistors, possibly aggravating the parasitic choke failure.Then you can reinstall the tube socket sub chassis back into the main chassis with the 8 screws you removed from the bottom of the amplifier. I was able to salvage the plate choke in this amp because I had some unobtainium Q Dope, a special low loss polystyrene cement. I also install an arc protect fuse and resistor in the HV lead.Note some colored nail polishes use metallic or conductive ingredients.
Ameritron 10 Meter Mods Pdf Files Free
You can see a close up of one of them, from the filament to the NEW grounding lug at the top of my photo. As radio amateur time is free and one can modify at random time. After I completed the W8JI mods, I still mwter the problem of the clicking or popping noise in the receiver.The Warrior also used neutralization.
Mods.dk - Instruction, users and service manuals for AmeritronMain MenuManuals for AmeritronThis is the manuals page for Ameritron. In this page you find schematic, users and instructions manuals, service manuals, technical supplement, leaf leads and other good stuff. If you have some stuff that not is listed here you can donate this by.Note that there is a limit to the number of files you can download.