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Re: Improving cooling of JUMA PA100-D

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.

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73
Roland
by HB9VQQ
09 Jan 2018 19:21
 
Forum: Juma Discussion
Topic: Improving cooling of JUMA PA100-D
Replies: 10
Views: 1900

Re: Improving cooling of JUMA PA100-D

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-B...
by HB9VQQ
06 Jan 2018 01:21
 
Forum: Juma Discussion
Topic: Improving cooling of JUMA PA100-D
Replies: 10
Views: 1900

Re: Improving cooling of JUMA PA100-D

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
by HB9VQQ
05 Jan 2018 11:14
 
Forum: Juma Discussion
Topic: Improving cooling of JUMA PA100-D
Replies: 10
Views: 1900

Re: Improving cooling of JUMA PA100-D

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...
by HB9VQQ
05 Jan 2018 10:55
 
Forum: Juma Discussion
Topic: Improving cooling of JUMA PA100-D
Replies: 10
Views: 1900

Re: Improving cooling of JUMA PA100-D

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 supe...
by HB9VQQ
05 Jan 2018 10:24
 
Forum: Juma Discussion
Topic: Improving cooling of JUMA PA100-D
Replies: 10
Views: 1900

Re: Improving cooling of JUMA PA100-D

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 ...
by HB9VQQ
02 Jan 2018 12:19
 
Forum: Juma Discussion
Topic: Improving cooling of JUMA PA100-D
Replies: 10
Views: 1900

Re: Improving cooling of JUMA PA100-D

Hi Matti,

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

Image

Happy New Year !
73 Roland
by HB9VQQ
02 Jan 2018 12:15
 
Forum: Juma Discussion
Topic: Improving cooling of JUMA PA100-D
Replies: 10
Views: 1900

Improving cooling of JUMA PA100-D

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
by HB9VQQ
28 Dec 2017 13:39
 
Forum: Juma Discussion
Topic: Improving cooling of JUMA PA100-D
Replies: 10
Views: 1900

Re: Problem with F-Sense not detecting Band

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-S...
by HB9VQQ
22 Apr 2017 15:30
 
Forum: Juma Discussion
Topic: PA100-D Problem with F-Sense not detecting Band
Replies: 5
Views: 1227

Re: Problem with F-Sense not detecting Band

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

Any ideas ?
by HB9VQQ
21 Apr 2017 10:25
 
Forum: Juma Discussion
Topic: PA100-D Problem with F-Sense not detecting Band
Replies: 5
Views: 1227
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