开云体育

Has anybody found a modern quiet fan that moves enough air in this application?

My shop does a lot of audio work, when I turn on 2 or 3 of the mainframes the fan noise is such that subtle audio details are lost in the ambient wash of noise from the test gear rack.

I've had limited success with the DC Noctua fans. Reasonably quiet, but air flow not as strong.

Any suggestions? I really like my 7603's but have the same issue when working on audio gear.

Well...... I do have a rather strange solution:

3D print an adaptor that fits over the vents of the equipment. Use a shop vac airhose of any desired size.? Run all of them through Y adaptors and into a reasonable style of shop vac. Intstall an automatic switch on the requisite equipment so that when one is turned on, the shop vac is turned on.

Locate shop vac in room nearest annoying neighbor, vent outside.

Harvey

I use two TM506. These fans are loud, but very much air flow. I have put a 40°C "Normally Off" Thermo switch in series, attached it to the cooling plate near by the fan. As long a I do not fully load it with modules, the fan is off. Call it like a TM504. When it does switch on, the modules have become warm indeed. In most of the use, as I have here, the fan is off. Like with a scope and two multi meters, the fan stays off. But with 6 modules it turns on after 20 minutes. I think because this closes the front opening, and there is no airflow possible through the front any more. Using a 40° switch works very good for me.

I have a replaced the fan on my TM506 with this fan: ETRI LV 141 1700RPM 55CFM 115V 8W. Link to data sheet here: This particular model is very quiet.

The higher speed models listed on this datasheet are noisier fans, those models are typically used on CNC machines to cool the power supplies and electronics.

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Michael Lynch
Dardanelle, AR

Michael, thanks for the part number. May I ask what vendor you sourced them from?

Would the same fan fit my R7603's?

Michael, thanks for the part number. >May I ask what vendor you sourced >them from?

Would the same fan fit my R7603's?

I found these as NOS on E-Bay. I have No idea if they will fit the 7603 Rack mount. But I am thinking that they might just work. I have never seen inside a R7603, but looking at the manual the illustration appears very similar to the RTM506 fan.

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Michael Lynch
Dardanelle, AR

I replaced the fan in my TM506 an TM5006 with 220volt Papst models. Mechanically identical, very quit.

As to the airflow: as long as the temperature of the outgoing air is moderate I do not see any problem. The modules remain cool compared to a TM503 without fans. And I usually do not operate the frame when ambient temperatures are above 35°C - due to overheating of brains :-)

cheers
Martin

I have also replaced mine a few years ago with one (220v) I bought from my local electronics store.
I can’t tell you the make off the top of my head, but it’s much, much quieter than the original one.
I can only imagine that anything modern and new you replace it with will make a huge improvement.

Well, mine is actually a very old one... I bought it decades ago.

Its much quiter because it doesn't run on nominal speed, the supply in the TM506 or TM5006 giving only 110V to the fan. The remaining noise is mainly from the bearings.

cheers
Martin