Products > Test Equipment
Upgrading Mainboard in Lecroy DDA-3000 (aka WavePro 7300a?)
analogRF:
--- Quote from: ZhuraYuk on November 07, 2019, 07:26:04 pm ---
--- Quote from: analogRF on November 07, 2019, 02:49:23 pm ---
instead of those Gentle Typhoon Nidec fans (D1225C12B7) which was mentioned in the thread, I found these fans that you can easily buy from mouser : Sanyo Denky 9G1212F101 for the two big ACQ fans and Delta AFB0912H-F00 for the PSU fan
I have not replaced them yet but these fans are easily available and they have better specs both in air flow and static pressure and with the same noise level (or even slightly better) than those Gentle Typhoon fans which was expensive (at least for me with shipping to Canada)
--- End quote ---
Can you post screenshot of your temperatures for Aladdin acquisition board from Service Menu after you replace the fans?
I see that they are twice weaker as original ones and have high doubts about their ability to keep temperatures in safe ranges.
--- End quote ---
yes certainly I will do that when i find the time to replace the fans. hopefully soon...I already have them here...
but several people have reported their temps are the same or even 1-2deg better with those gentle typhoon fans
if that is the case, these ones must be even better because they have better specs than Nidec fans. However, yes they are still weaker
than the original panaflo fans which are loud like a 747 engine
nctnico:
--- Quote from: ZhuraYuk on November 07, 2019, 07:26:04 pm ---
--- Quote from: analogRF on November 07, 2019, 02:49:23 pm ---
instead of those Gentle Typhoon Nidec fans (D1225C12B7) which was mentioned in the thread, I found these fans that you can easily buy from mouser : Sanyo Denky 9G1212F101 for the two big ACQ fans and Delta AFB0912H-F00 for the PSU fan
I have not replaced them yet but these fans are easily available and they have better specs both in air flow and static pressure and with the same noise level (or even slightly better) than those Gentle Typhoon fans which was expensive (at least for me with shipping to Canada)
--- End quote ---
Can you post screenshot of your temperatures for Aladdin acquisition board from Service Menu after you replace the fans?
I see that they are twice weaker as original ones and have high doubts about their ability to keep temperatures in safe ranges.
--- End quote ---
If you check the graphs of the fans carefully you'll see that the replacement fans aren't weaker at all. The maximum pressure is at zero airflow and the maximum flow is at zero pressure and the graphs are far from linear. In other words: you can't just compare pressure and airflow numbers when comparing fans. The operating point is somewhere in between and that is where the replacement fans match the original fans.
nctnico:
--- Quote from: DaJMasta on November 07, 2019, 06:01:54 pm ---I've also ran into some encoder issues on WP7k scopes, but mine have always just been oxidation from disuse. Give em a few dozen spins and they start working alright again - just seems like when stored in a non-ideal climate and not used for a while, they take some working to get registering properly again.
--- End quote ---
That could be the case with my 7200A. I already had to fix a lot of contact related issues in mine and it came from Singapore (where -I know from my own experience- it is very humid). I have not tested all the encoders yet but so far 6 are flaky or worse.
ZhuraYuk:
Here is my temperatures after 30 min run in 2ch 20GS mode at 7300A. This is with sound absorbing foam vent mod.
nctnico:
What is the temperature in the room? With a room temperature of around 23 degrees the MAD temperatures in my 7200A are around 66 degrees.
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