Bad hum trimmer in VH4? Where to get new one?

  • Thread starter Thread starter i.ak
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i.ak

i.ak

Member
Hello,

As far as I know, I have a dysfuncional hum trimmer in my VH4. I had a powerful power tube short (KT88), which I believe caused this.

It seems that there is sort of a contact problem in the trimmer when you adjust it. This happens only in the more or less middle position of the trimmer where according to my knowledge and experience the hum should be gone. Also, if I tap the trimmer (on Ch3 or 4) it produces loud cracking sound, kind of like a sound similar to grounding problems. Or may there be something else, which causes this?

Where can I get a new one to replace the current trimmer? Is there an European online dealer from whom I may order suitable trimmers (I might get few for spare as well)? I would be interested in the very same layout as that the current has, because the ones I found on the local stores looked more or less incompatible.

I know that the trimmer's values should be 100Ohm / 0.5 W, but who is the manufacturer of such trimmers that are used in the Diezels?

Thank You.
 
Please go to Your local electronics dealer and simply ask for the part.
 
Thank You Peter,

I have already visited two local electronics stores from which one did not have such a part and another one offered me something that looked that it simply will not match. I try again in few another places after the New Year holidays.

Am I correct that all I need to ask for is a trimmer that has 100 Ohm resistance and rate of 0,5 W, no other requirements?


Peter Diezel":6936a said:
Please go to Your local electronics dealer and simply ask for the part.
Click to expand...
 
Yup, just a simple trimmer. 0,5 watt would be fine, 0,2 watt works also.
Please adjust it on channel 4 for minimum hum.
 
Thank You.

It should not be that difficult to find a proper trimmer. I guess the major problem is my English-Finnish-electronics vocabulary. Maybe I should make a phone call to my friend who has an university degree in electronics and technology. :D

All the best to the Team Diezel and Happy New Year to equally everyone on the forum.
 
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