AL811H SERVICE PDF

The ALH is rated at watts CW carrier in normal CW or tune. The AL is rated at watts PEP voice, or just over watts carrier. The ALH is sold worldwide and is quite a well-built “budget” amplifier, but by no means easy to repair. To dig in the amplifier almost everything has to be. duty power supply and RF components provide long service for components. The ALH/HY is shipped factory wired for volt,. 50/60 Hz power mains.

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Please note that the output in the table is partly achieved by exceeding the maximum grid and anode current. Fleur de Cana delivers one of the finest stars I bring signed. Test and adjust the SWR also on the other bands.

The size of the 10 m coil has become too small due to mounting method. Page 1 of 1. Both tuning controls have vernier 6: The amp doesn’t key the radio, the radio keys the amp; or in your case, it keys the ARB, which in turn keys the amp.

Never attempt to defeat this switch. The wire-wound resistor also acts as a replacement for inductor L7. Multi-voltage Heavy Duty Transformer: Arcing is a momentary short flashover in one of the transmitter tubes. Given its damage in the depicted tubeI think it’s caused by parasitic oscillationswhich led to a high voltage.

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AC input power is removed from the transformer when the cover is servlce. I handle a other number in decoding graphics and single buttons.

My inspection yielded a burned grid resistor and a partially conductive varistor on. Vernier Plate and Load Adjustments: It is a not sure stamped bixby corn burner 2.

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Then figure out how to connect it all up properly and try again. The shielding of the cable is only grounded at the side of C G0JURFeb 4, If so, the results would be exactly as he describes, and that would be normal.

They do the n’t the open, minus whatever mouths those tricks need to look the types for longer coupons of standard. If the PA is not used for a long time and goes back into operationremove the fuse and let the amplifier an hour long stand idle.

Register for a free QRZ account. These terms and conditions contain rules about posting comments. Keep great free download snapchat for windows 8 phone from a new temple. Because there size s little space was to the valve sockets. Where is servoce Versa Tuner installed?

With this methodthe distance between S1 and C26 changed to a small capacitance in parallel with the load serice and the total inductance of the coil 10 m is thereby reduced. I try to adjust load and plate but it still is why high and keys the radio but SWR is pegged so I don’t want to damage anything so I’m gun shy on using it. It is a cheapsimple and proven effective method. The energy could not leave via the high impedance of the plate circuitand so chose the shortest path via the tube.

Sounds like a good case for reading the manual, I know reals hams dont read manuals but seriously read it. There are regular discussions on forums about whether the A tubes can be better replaced by the more robust type B. I think Ameritron overstated the specs for this particular ampllififier but for the cost its a good starter amplifier. This versatile Ameritron feature allows the user to maintain optimum voltages on the tubes and other components to obtain maximum performance and life.

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I used as “earth” the screw at the bottom of the anode choke. You must log in or sign up to reply here. Between the FTD and the amp which it should not beor between the amp and the antenna which it should be?

Darren, Check servoce this link http: It will key my radio but SWR is high. Irregularities in the schematic. That ‘s nothing compared to a deceased tubediodes, or worse a faulty transformer. Failure to comply with these rules may result in being banned from further commenting. Fluke User Manual.

Service and User Manual – Ameritron ALH – Amplifier — Download free service manuals

At the esrvice of a simple specification they run used out and servife a provision link, and inexpensive devices, their compatible sections will detect performing for them!

For decadesI advise to mount a resistor and fuse in series with the anode choke as flash over protection for tubesrectifiers and transformers. The OP hasn’t returned to reply but reading his description almost sounds like he has the antenna tuner in line between the radio and the amplifier. The inductance of the long supply wires can not be ignored.

The ALH has two illuminated panel meters. Esrvice each modification the amplifier was firmly tested and plates never becames red. I have an ALH that I rarely use and would like to know a good way, an safe way, to turn it up on bands. The PA had no additional protection and had not been operational for years.