We seek to understand and document all radio transmissions, legal and otherwise, as part of the radio listening hobby. We do not encourage any radio operations contrary to regulations. Always consult with the appropriate authorities if you have questions concerning what is permissable in your locale.

Author Topic: KiWiSDR fan problem  (Read 5618 times)

Offline WA4FHY

  • Full Member
  • ***
  • Posts: 179
    • View Profile
    • Email
KiWiSDR fan problem
« on: July 17, 2019, 1457 UTC »
Late last year I bought a KiWiSDR and also ordered the metal case. The case included a small (5 vdc, ~30mm box type) fan.
After just a few months, the fan became very noisy. I removed it, cleaned it (nothing like sharing a house with a long haired cat
even thought the SDR is up on a desktop), and even carefully peeled back the label and lightly oiled the fan bearing. That
helped for a short while and now the noise is back.

Has anyone else run into this and how did you fix it? I e-mailed seeedco asking about getting a replacement and also a spare;
I have not received a response as of this morning.
Thankis
SDR-IQ / IC-R70 / IC-735 / FT-817ND, 5 band vertical & 4 position antenna switch
Near Music City, TN

Offline ChrisSmolinski

  • Administrator
  • Marconi Class DXer
  • *****
  • Posts: 23088
  • Westminster, MD USA
    • View Profile
    • Black Cat Systems
Re: KiWiSDR fan problem
« Reply #1 on: July 17, 2019, 1600 UTC »
Mine also creates that noise. I'm not sure it is the fan itself or if it is something else vibrating, if i pick up the KiwiSDR it stops. I have also been able to wedge a piece of folded paper into the space between the PCB and board to stop the vibration.
« Last Edit: July 18, 2019, 1105 UTC by ChrisSmolinski »
Chris Smolinski
Westminster, MD
eQSLs appreciated! csmolinski@blackcatsystems.com
NRD 545 / netSDR / AFE822x / AirSpy HF+ / KiwiSDR / 670 ft horizontal loop / 500 ft northeast beverage / 58 ft T2FD / 300 ft south beverage / 43m / 20m / 10m  dipoles / Crossed Parallel Loop

Offline WA4FHY

  • Full Member
  • ***
  • Posts: 179
    • View Profile
    • Email
Re: KiWiSDR fan problem
« Reply #2 on: July 18, 2019, 0052 UTC »
Thanks Chris, I'll see if giving it a wedgie will help. :) I do know that picking it up and moving it
around does not do anything. Early on, I also tried giving it a couple of low distance "techno-drops"
and that didn't help the noise either.
SDR-IQ / IC-R70 / IC-735 / FT-817ND, 5 band vertical & 4 position antenna switch
Near Music City, TN

Offline bagmouse7

  • Newbie
  • *
  • Posts: 1
    • View Profile
    • Email
Re: KiWiSDR fan problem
« Reply #3 on: August 10, 2019, 0210 UTC »
I gave up on the fan and disconnected mine.
I haven;t seen any heat problems in the metal case, but I usually only run 1 or 2 receivers at time on it.
I really like the KiwiSDR it's a great little receiver!

Offline Pigmeat

  • DX Legend
  • ******
  • Posts: 4092
    • View Profile
Re: KiWiSDR fan problem
« Reply #4 on: August 10, 2019, 1030 UTC »
Obviously you fellas didn't get the "Fan Control Knob" option required to control the vibration.

I don't know why SDR manufacturers aren't more forthcoming with the optional knob features of their receivers? Once you get them installed a SDR looks like a respectable radio along the lines of a Drake R-8.

Offline WA4FHY

  • Full Member
  • ***
  • Posts: 179
    • View Profile
    • Email
Re: KiWiSDR fan problem
« Reply #5 on: August 11, 2019, 0056 UTC »
Sorry, PM, I missed seeing the knob option when I ordered mine! :)
I still miss my faithful old Drake 2-B from back in the 60s
(not that I really remember that time period ;)) - 70s.

Chris, I have played with the board vibration you mentioned and
it does help. I have some high density closed cell foam that I jammed
between the antenna connectors and the case and that has made it
a little quieter but I still think the main problem is the #$@*^% fan.

If I have to, I'll try disconnecting the fan as bagmouse7 did.
SDR-IQ / IC-R70 / IC-735 / FT-817ND, 5 band vertical & 4 position antenna switch
Near Music City, TN

Offline Josh

  • DX Legend
  • ******
  • Posts: 3016
    • View Profile
Re: KiWiSDR fan problem
« Reply #6 on: August 11, 2019, 1800 UTC »
Obviously you fellas didn't get the "Fansome Control Knob" option required to control the vibration.

I don't know why SDR manufacturers aren't more forthcoming with the optional knob features of their receivers? Once you get them installed a SDR looks like a respectable radio along the lines of a Drake R-8.

edited for accuracy
Conveniently located near Vincennes Indiana.