Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Resistor fastener.
Resistor fastener.
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 30th June 2020, 07:21 PM   #1
mchambin is offline mchambin  France
diyAudio Member
 
Join Date: Mar 2011
Default Resistor fastener.

I am thinking of an opamp amplifier where I could change its gain by changing resistors.
Using large SMD resistors, is there fasteners like small fuse holders to hold such resistors.
Do you see solutions that would achieve reliable contacts.
I do not want a pot, because I need fixed gains that are extremely stable, looking for no gain drift.
__________________
Transistor junction temperature is not transistor case temperature.
  Reply With Quote
Old 30th June 2020, 07:33 PM   #2
rayma is offline rayma  United States
diyAudio Member
 
Join Date: Apr 2011
For leaded components, Mill-Max makes a wide range of single pin sockets.
https://www.alliedelec.com/m/d/c6c6f...f3808cebdf.pdf

There are (expensive) sockets for smt transistors, but haven't seen any for resistors.

I would solder smt resistors on the pcb, and use jumpers on headers to select different values.
The "leads" on the smt parts are not intended for a reliable mechanical connection, just soldering.
https://s3.amazonaws.com/catalogspre...0%20JUMPER.pdf

Last edited by rayma; 30th June 2020 at 07:43 PM.
  Reply With Quote
Old 30th June 2020, 09:18 PM   #3
mchambin is offline mchambin  France
diyAudio Member
 
Join Date: Mar 2011
Mill-Max products are nice.
I use tulip pin sockets that come as 14 or 16 single pins on a dummy that you remove once it is soldered. This gives a 14 or 16 pins IC socket, without any plastic. I like those very much, but do not have much left. Where can I source these ?
Tulip pins is a good solution to hold thru hole resistors, I think.
__________________
Transistor junction temperature is not transistor case temperature.
  Reply With Quote
Old 30th June 2020, 09:23 PM   #4
rayma is offline rayma  United States
diyAudio Member
 
Join Date: Apr 2011
I've seen those for automatic insertion, but not in small quantities.
Mill-Max has some sockets that are large enough for smaller TH resistors.
  Reply With Quote
Old 1st July 2020, 12:54 AM   #5
Vovk Z is offline Vovk Z  Ukraine
diyAudio Member
 
Join Date: Oct 2011
Location: Kyiv
You can use some switches. For example, DIP switch, or rotary switch (RS1010-23).
  Reply With Quote
Old 1st July 2020, 03:28 AM   #6
JMFahey is offline JMFahey  Argentina
diyAudio Member
 
JMFahey's Avatar
 
Join Date: Mar 2009
Location: Buenos Aires - Argentina
+1 on the DIP switch suggestion.

And since they are independent and you can activate more than one at any moment, you can not only have the basic resistor values but their combinations.
__________________
Design/make/service musical stuff in Buenos Aires, Argentina, since 1969.
  Reply With Quote
Old 1st July 2020, 07:27 AM   #7
mchambin is offline mchambin  France
diyAudio Member
 
Join Date: Mar 2011
I have DIP switches and jumpers but I rather avoid these because I want an ultimate no noise pick up and thermal drift.
This is for a design where I aim at an ultimate gain stability to 0.01 dB resolution.
This will go to gain calibration with a MDAC in the gain chain. ( I am not sure of the fixed gain best value.)
So I need a layout as neat as possible.
I could use SMD resistors on large pads and change resistors by soldering. How many changes the PCB could stand ? What grade of PCB and layout would be wise ? May be low temp solder ?
__________________
Transistor junction temperature is not transistor case temperature.
  Reply With Quote
Old 1st July 2020, 07:43 AM   #8
KatieandDad is offline KatieandDad  United Kingdom
diyAudio Member
 
KatieandDad's Avatar
 
Join Date: Nov 2011
Location: UK
SMD resistors can be easily soldered to strip board.
  Reply With Quote
Old 2nd July 2020, 01:58 PM   #9
mchambin is offline mchambin  France
diyAudio Member
 
Join Date: Mar 2011
What is your favorite SMD resistors for hand soldering.
Size ?
Brand ?
__________________
Transistor junction temperature is not transistor case temperature.
 

Reply


Resistor fastener.Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Speaker output resistor+cap burned, value of resistor?? towlieee Class D 7 5th June 2019 05:12 PM
Fastener Super Store WoodScrews Vendor's Bazaar 12 1st September 2018 09:24 AM
Which resistor type for emitter resistor? sajti Parts 25 8th April 2009 06:12 AM
Speaker grill/cover and grill fastener questions. marchel Multi-Way 4 22nd January 2008 01:41 PM
screen-plate resistor and grid leak resistor metebalci Tubes / Valves 4 26th February 2004 03:18 AM


New To Site? Need Help?

All times are GMT. The time now is 04:10 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
Copyright ©1999-2020 diyAudio
Wiki