JUMA Amateur Radio Forum

Seems like there is a new winner in terms of cooling performance. It is the Sunon MB50151V1-000U-A99 (50x50) , check out the figures in the spreadsheet. Not as quiet as the Noiseblocker though.



73
Roland

Did some more Fan testing today. Here is the link to the spreadsheet with the measurements https://docs.google.com/spreadsheets/d/160zxFqoeWO1vEK8CzGwfesuZimipC-jAael_r2FWVsw/edit?usp=sharing While the stock Fan seems to be the most efficient in terms of cooling, I still prefer the Noiseblocker NB ...

Hmmm that is a very good point. Purchased my PA100-D second hand, never questioned the install of the Fan... Since I already installed the new Fan blowing outwards and out of curiosity I will measure the thermal impact compared to blowing to the heatsink.

Stay tuned
73

Well the stock fan was installed pointing the arrow on the housing of the Fan outwards, NOT blowing to the heatsink .... So I installed the new Fan the same way...

Hi Matti, I replaced the stock Fan with a Noiseblocker NB-BlacksilentPRO PR2 ( 60x60x25mm ) http://bit.ly/2AvrRyg . It is bigger than the stock Fan (50x50x10mm) but with the help uf some Sugru I fixed the new Fan to the Fins of the Heatsink. The Noiseblocker delivers an airflow of 29m3/h and is ...

I just ordered a replacement FAN http://bit.ly/2EzeSin see how this works. According to spec sheet this FAN provides 15,1m3/h airflow while consuming only 0.6W. The original FAN in my PA100-D is from Yen Sun Technology Model FD5010-N (12V, 0.09A) http://i63.tinypic.com/o0yotu.jpg providing 10.9 CFM ...

Hi Matti,

thanks for your reply. Seems that is already the case with my PA100-D.



Happy New Year !
73 Roland

Greetings, I am using my PA100-D mainly for digi modes. SWR is below 1.5, still PA gets hot (70 degrees celsius) when operating in digi modes like RTTY , Olivia, JT65 etc. Usually running max.50W Is there an easy modification to improve cooling of the PA ? Replacing heatsink or bigger Fan ? 73 Roland

Thanks Adrian, I will need to send the PA in for repair since I neither have the required equipment nor the required knowledge. Since the PA is working fine with the manual Band select I guess there is not too much damage. As you already pointed out it seems there was way to much input RF to the F ...

After soldering a new 1000pF 100VDC capacitor (C1) I still get an "Err" when Auto Band select mode is enabled...

Any ideas ?