Author Topic: SMT trimmer capacitor tuning tool ?  (Read 426 times)

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Offline DimitriP

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SMT trimmer capacitor tuning tool ?
« on: September 15, 2019, 02:02:46 am »
My current tool is a clipped component lead, slightly flattened using needle nose pliers, that kinda sorta "fits".
I tried filing one of my plastic diddle sticks, but by the time you get to the microscopic size there is barely any plastic left to engage.

Can anyone recommend a tuning tool for microscopic variable capacitors ?
   If three 100  Ohm resistors are connected in parallel, and in series with a 200 Ohm resistor, how many resistors do you have? 
 

Offline shakalnokturn

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Re: SMT trimmer capacitor tuning tool ?
« Reply #1 on: September 16, 2019, 06:18:49 pm »
How small are your capacitors? Photo?
Anything like the Johanson Thin-Trim series?
 

Offline DimitriP

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Re: SMT trimmer capacitor tuning tool ?
« Reply #2 on: September 16, 2019, 07:42:15 pm »
How small are your capacitors? Photo?
Anything like the Johanson Thin-Trim series?
I didn't take a picture of the variable capacitor but the variable resistors in the picture are similar in size - They make the 'scope probe look like a telephone pole by comparison :




   If three 100  Ohm resistors are connected in parallel, and in series with a 200 Ohm resistor, how many resistors do you have? 
 

Offline DimitriP

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Re: SMT trimmer capacitor tuning tool ?
« Reply #3 on: September 16, 2019, 08:14:55 pm »
Here is the actual picture of it on the board and another found online that shows more detail

   If three 100  Ohm resistors are connected in parallel, and in series with a 200 Ohm resistor, how many resistors do you have? 
 

Offline shakalnokturn

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Re: SMT trimmer capacitor tuning tool ?
« Reply #4 on: September 16, 2019, 08:21:42 pm »
https://www.rf-microwave.com/en/trimmer-adjustment-tools/163/

You'll find similar stuff on Amazon, Aliexpress...
I'd go for the models with stainless, ceramic or aluminia tips.
 
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Offline shakalnokturn

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Re: SMT trimmer capacitor tuning tool ?
« Reply #5 on: September 16, 2019, 09:17:47 pm »
Your trimmer looks like a Murata TZR1 or TZY2 series for which specific Murata tuning tools have been made, I doubt you'll ever find one though.
 

Online Mechatrommer

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Re: SMT trimmer capacitor tuning tool ?
« Reply #6 on: September 16, 2019, 09:26:24 pm »
looks like one among these...
https://www.ebay.com.my/itm/10-pc-Triming-Trimmer-Tool-Set-Electronic-Preset-adjustment-alignment-911/362744408778?hash=item5475406aca:g:sRUAAOxy14VRRZK-
last time i was search for trimming tool supply similar to the one used by and supplied with dso probe (cross on one end flat on the other end) but either no supplier, or the price is unreasonable from the USA. i have those pictured small smd trimmer resistor as well and TH variable capacitor with cross head...
It's extremely difficult to start life.. one features of nature.. physical laws are mathematical theory of great beauty... You may wonder Why? our knowledge shows that nature is so constructed. We simply have to accept it. One could describe the situation by saying that... (Paul Dirac)
 


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