The replacement appears to be another plastic type.? ? You would think that with all the various blowers out there, there is probably a replacement? dayton blower wheel that would fit...and they all use a 1/4" shaft.?
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I gave up on the oem drake blower.? Retrofitted the EBM papst blower from the AL- 1500/1200/82 amplifier? into the L4B.? While at it, replaced the 4" x 4" coleman lantern chimneys with the tapered types from the ameritron? AL-82 .? ?End result is over double the airflow.??
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Another way to knock down some heat is to add some bias....like 10 x 1N5408 diodes in series.? ?Then it idles at 100 ma on SSB....and 40ma on CW.? ?IMD at 1290watts pep out on? SSB...and 625 watts pep out on CW position is superb.?
