How the heck do I solve this problem???? - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 21st September 2010, 02:57 PM   #1
djn is offline djn  United States
diyAudio Member
 
djn's Avatar
 
Join Date: Oct 2004
Location: Waterford Michigan
Default How the heck do I solve this problem????

Hi All, I am building a RatRod amp with the 6LR8 compactron tube. As you can see by the pix it will be flat black and I will pin stripe it with white and red....just like a RatRod. Anyway, the two outboard holes on the front are for Oil Pressure and Oil Tempature gauges. How can I make those two gauges work as VU meters?????
Attached Images
File Type: jpg IMG_4004.JPG (883.5 KB, 284 views)
File Type: jpg IMG_4005.JPG (920.7 KB, 269 views)

Last edited by djn; 21st September 2010 at 02:59 PM.
  Reply With Quote
Old 21st September 2010, 05:14 PM   #2
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Purchase a set of those round Chinese made VU meters that show up on eBay from time to time?
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 21st September 2010, 05:16 PM   #3
djn is offline djn  United States
diyAudio Member
 
djn's Avatar
 
Join Date: Oct 2004
Location: Waterford Michigan
At first I was going to do that but then realized that this is a RatRod amp and it should have car gauges.
  Reply With Quote
Old 21st September 2010, 05:20 PM   #4
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Quote:
Originally Posted by djn View Post
At first I was going to do that but then realized that this is a RatRod amp and it should have car gauges.
Most car gauges I am familiar with have hot wire mechanisms which probably have too long a time constant to work well for this application. (I could be wrong)

I think taking some meters and modifying them to look like car gauges would work a lot better.

I'd look at Stewart Warner's automotive electric gauges and see if they have anything that might work..
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 21st September 2010, 05:25 PM   #5
Arnulf is offline Arnulf  Europe
diyAudio Member
 
Join Date: Feb 2009
I don't see any red and white stripe
__________________
mod verb, transitive /mod/ to state that one is utterly clueless about the operation of device to be "modded" and into "fixing" things that are not broken; "My new amplifier sounds great so I want to mod it."
  Reply With Quote
Old 21st September 2010, 06:11 PM   #6
diyAudio Member
 
Michael Koster's Avatar
 
Join Date: Jan 2008
Location: Eureka, CA
Quote:
Originally Posted by djn View Post
At first I was going to do that but then realized that this is a RatRod amp and it should have car gauges.
Get some round meters and make new dial scales for them marked "oil temperature" and "turbine inlet temperature" , "EGT", or whatever with green and red segments...

Meter - from Tonne Software

Cheers,

Michael
  Reply With Quote
Old 21st September 2010, 06:25 PM   #7
diyAudio Member
 
Frank Berry's Avatar
 
Join Date: Sep 2003
Location: Midland, Michigan
You could purchase or borrow the Oil Temperature and Turbine Inlet Temperature gauges and scan the faces of the gauges. Glue the scanned images to a couple of VU meter movements.
As for connecting the VU meters, all you'll need is a bridge rectifier (using Schottky or Germanium diodes) fed from the secondary side of your output transformers and a 1k pot so that you can adjust the sensitivity of the meters.

Please share a photo after you have completed the project. It looks good so far.
__________________
Frank
  Reply With Quote
Old 21st September 2010, 06:30 PM   #8
diyAudio Member
 
Wavebourn's Avatar
 
Join Date: Sep 2006
Location: Pleasant Hill, CA
Send a message via Skype™ to Wavebourn
Thank you Michael, nice software!
Attached Images
File Type: jpg meter.jpg (20.0 KB, 190 views)
__________________
The Devil is not so terrible as his math model is!
  Reply With Quote
Old 21st September 2010, 07:19 PM   #9
djn is offline djn  United States
diyAudio Member
 
djn's Avatar
 
Join Date: Oct 2004
Location: Waterford Michigan
Nope, no stripes yet. I just now finished all the drilling and whacking and now taking it to Ron's for pin striping.

Thanks all for your suggestions. I really don't care for VU meters, I just thought that since I was messing with it, I could turn the car stuff into VUs. When I get the meters, I see what I can do but it sounds like it might not work as I'd hoped.
  Reply With Quote
Old 22nd September 2010, 12:48 AM   #10
taj is offline taj
diyAudio Member
 
taj's Avatar
 
Join Date: Feb 2005
Heck, I can draw up anything you can imagine. Let me know if you need a custom meter dial done up (nicely.)

Wavebourn, ... nice. :-)

..Todd
  Reply With Quote

Reply


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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
lets see if u can solve this puzzle sss The Lounge 1 5th October 2007 05:20 AM
Help me to solve my UcD400s Problem ncc Class D 8 3rd October 2007 08:21 AM
Crackle !! can't solve ?? titanchen68 Class D 29 7th May 2006 04:20 AM
Please help me solve the problem MlinarS Tubes / Valves 14 2nd June 2005 03:12 PM
Need help to solve potential imaging problem! jim_vt Full Range 9 11th May 2005 07:35 PM


New To Site? Need Help?

All times are GMT. The time now is 02:07 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2