I have a toptek pa 500 and cannot get 500 watts of it for 50 watts input ssb on 14 mhz into a dummy load...., amp is clean inside with no burnouts visible, there are adjustment points, but having no info on the said unit, i am reluctantant to play with it.,anyone have any ideas?
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Toptek PA 500
- Thread starter villarge
- Start date
It is well protected so just increase the input power till you get your 500W on 20.
It wont to that on the higher bands and you will be lucky to get 200w out of it on 10m
it should be good for 80w input.
It wont to that on the higher bands and you will be lucky to get 200w out of it on 10m
it should be good for 80w input.
Thanks for the info, i had a tech guy check the amp out even though i am no slouch with electronics, he informed me that the finals had at one point been changed for matching lower gain 2879 units, i checked , whoever did replace them fooled me lol.he did adjust the bias as it was a bit low, i do get get more than 200 watts out of it on 10 m for 25 watt drive, the original label on the bottom states 50 watts max ssb and 25 watts cw , the inside is very clean, no scorch marks etc, i am very conservative about running anything flat out, it does get hot quite quick i must admit , the internal fan works but seems pointless being on the wrong side of the heatsink. its defo a keeper