View and Download AMERITRON ALH instruction manual online. HF POWER LINEAR AMPLIFIER. ALH Amplifier pdf manual download. Manuals and User Guides for AMERITRON ALH. We have 1 AMERITRON ALH manual available for free PDF download: Instruction Manual. Download AMERITRON ALH 1,,5MHZ LINEAR AMPLIFIER SM service manual & repair info for electronics experts.
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I thought maybe the 2N had failed. Register for a free QRZ account.
AMERITRON AL-811H Manuals
Any suggestions would be welcome. The wire-wound resistor also acts as a replacement for inductor L7. My inspection yielded a burned grid resistor and a partially conductive varistor on.
Therefore, a sumiere test was done with the two types. However, it’s as if the Valves are getting no drive on Transmit. I like TT gear in general, but their dual Z amp is about as “unserviceable” as any I’ve ever seen.
Irregularities in the schematic. The suppression of the third- order harmonic is the difference between marker 3D and 4D. What a horrible linear amplifier! I don’t know what they were thinking. Test and adjust the SWR also on the other bands. In reality, no way to predict how the circuits actually behave. I used as “earth” the screw at the bottom of the anode choke.
The powerful spark induced scorching and inside a hole in the sl-811h. Because there size s little space was to the valve sockets. I’m guessing it was designed at the Christmas party and they were all drunk.
However, here are photos of the circuit boards, one for the earlier version and one for the later version.
That was not the diode I was thinking of. I assume there are no professional repair people around.
Ameritron ALH Manuals
G3YROAug 2, AF6LJAug 1, Given its damage in the depicted tubeI think it’s caused by parasitic oscillationswhich led to a high voltage. I’ve never seen one before. Please note that the output wl-811h the table is partly achieved by exceeding the maximum grid and anode ameriton. Arcing is a momentary short flashover in one of the transmitter tubes. It is a cheapsimple and proven effective method. The Grid current meter was reading on transmit with no drive.
No the meters are both OK. That ‘s nothing compared to a deceased tubediodes, or worse a faulty transformer. Can you site some issues you think are not good and how it can mznual improved. The size of the 10 m coil has become too small due to mounting method.
The energy could not al-81h via the high impedance of the plate circuitand so chose the shortest path via the tube. Hopefully it didn’t smoke the meter Roger, you must be the only person in your area that is willing to tackle ham amplifiers with problems.
My preference would be given to the latter because I have more experience with it. I don’t know if there is even a “service” manual available for the ALH.