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To:, Artek Manuals <>
Subject: Re: [Amps] TL-922 FAN REPLACEMENT
From: Mark Robinson <>
Date: Sat, 13 Apr 2019 20:01:09 -0400
List-post: <>
Hi Dave,

Have a read of this,122601.0.html

On Page 1, I give the part number that I used and on Page 3, N0XWR gives more part numbers.

73 Mark N1UK

PS   To answer your question about an increased wattage fan, yes this will affect the operation of the fan during the turned off amp cooling sequence when the voltage to the fan is supplied from 240V through the thermal switch and  via dropping resistors when you are running on 240V.  During cooling, an increased wattage fan will run slower due to the increased voltage drop across the standard sized dropper resistors.

On 10-Apr-19 7:10 PM, Artek Manuals wrote:
OK I searched the archives and though the question was asked a couple of times over the last two decades I did not see  a direct answer to this question and what little info I did find is almost 10 years old.

My 35 year old TL-922 will likely need a fan in the not too distant future, the original is  nosier than I remember it ( been in the box for 5 years). and as we TL-922 owners know there are no longer ( as near as I can find)  any genuine factory replacement parts for this beast.

The voltage and the dimensions fro the fan are given known or easily measured items but what I have not been able to find is what the specified CFM rating or RPM specs for the are. Does anyone know the CFM for the original fan and/or has anyone found a drop in replacement in recent times from the likes of Mouser or Granger, etc. ?

Just to keep this thread focused ( I think as I read the archives that as ham a required personality trait is to have Attention Deficit Disorder (ADD) ...I know I qualify) .....I AM NOT INTERESTED in  modifying the unit for a 12V fan or a squirrel cage, etc... I am looking for a DROP IN REPLACEMENT for the ORIGINAL FAN. My fan still has a label on that says "CENTAUR CT3D55F 7.5 watts". So far a USA google search has not produced anything useful  near apparent possible replacements all seem to draw 2 to 3 times the wattage (18-25w vs 7.5w) . I have not looked at the circuit to decide if that is a problem but I suspect not

tnxs in advance

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