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

The diyAudio Store A forum for discussing anything about the products available in The diyAudio Store.

Amp Camp Amp Kit V1.6
Amp Camp Amp Kit V1.6
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 14th February 2019, 08:22 AM   #441
Alan4411 is offline Alan4411  Wales
diyAudio Member
 
Alan4411's Avatar
 
Join Date: Oct 2011
Location: West Wales
Good,
why not try a new pot first, costs pennies and nothing to loose.
Alan
  Reply With Quote
Old 14th February 2019, 09:19 AM   #442
astromo is offline astromo  Australia
diyAudio Member
 
Join Date: Nov 2017
Location: BFN
Quote:
Originally Posted by Alan4411 View Post
Good,
why not try a new pot first, costs pennies and nothing to loose.
Alan
Agreed. My tip would be to make it a 25 turn unit to make biasing easy.
  Reply With Quote
Old 16th February 2019, 09:57 PM   #443
Sidsmith is offline Sidsmith
diyAudio Member
 
Join Date: Jan 2019
Quote:
Originally Posted by Sidsmith View Post
I will check that tommorow and get back to you.

Well something strange, when I measure across R7, I measure 3.3K...on the other side its 10K.



I unsoldered R7 and check it and it measured 10K. But back in the circuit its remain at 3.3K. What can cause this ?
  Reply With Quote
Old Yesterday, 08:32 AM   #444
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
Amp Camp Amp Kit V1.6
You can not (generally) measure components in circuit and get reliable/repeatable results.

Interaction with other components, the slightest residual voltage remaining, meter test lead polarity and meter test voltage... all these things give totally erroneous results.
  Reply With Quote
Old Yesterday, 10:36 AM   #445
Alan4411 is offline Alan4411  Wales
diyAudio Member
 
Alan4411's Avatar
 
Join Date: Oct 2011
Location: West Wales
Quote:
Originally Posted by Sidsmith View Post
Well something strange, when I measure across R7, I measure 3.3K...on the other side its 10K.
I unsoldered R7 and check it and it measured 10K. But back in the circuit its remain at 3.3K. What can cause this ?
Hi Sidsmith,
Sorry, this is getting a bit 'circular'. I have been over the previous posts and unfortunately given the measurements you have it is difficult to draw a conclusion.
Last time you had a reading of zero ohms from ground to Gate of Q2 ( ... then from ground to G (Q2) = 0r )

Advice is still the same, remove the faulty board and inspect it for shorts, solder blobs etc. You could post a picture of the back of the board for us to see too?

After that it is guess work, start by checking Q2 and Q1 are Ok...
There are a couple of Youtube tutorials on how to do a simple test on a Mosfet transistor you could look at and so on.
Alan
  Reply With Quote
Old Yesterday, 09:04 PM   #446
ptol is offline ptol
diyAudio Member
 
Join Date: Feb 2019
I just received my kit but the screws and nuts were not included with the chassis. Would someone please tell me exactly what sizes of screws and nuts I need and in what quantity? It would be greatly appreciated as this is the only thing preventing me from assembling my amp. I hope this is the right thread for this question.



Thank you
  Reply With Quote
Old Today, 06:23 AM   #447
Alan4411 is offline Alan4411  Wales
diyAudio Member
 
Alan4411's Avatar
 
Join Date: Oct 2011
Location: West Wales
Hi ptol,
The hardware for the kit should be included with the package containing the boards and parts, not in the chassis kit. Sorry if it is missing.

If it is not there have a look at post #6975 here; Amp Camp Amp - ACA

It should get you going.
Alan
  Reply With Quote
Old Today, 08:51 AM   #448
astromo is offline astromo  Australia
diyAudio Member
 
Join Date: Nov 2017
Location: BFN
Quote:
Originally Posted by Alan4411 View Post
Hi ptol,
The hardware for the kit should be included with the package containing the boards and parts, not in the chassis kit. Sorry if it is missing.

If it is not there have a look at post #6975 here; Amp Camp Amp - ACA

It should get you going.
Alan
When it came to spare fender, or (as per local parlance where I'm from) "mudguard", washers I struggled to find something workable with a circular outer diameter. I wanted a washer sufficiently large to spread the bolting force across the MOSFET to achieve good thermal contact, without needing to risk damage from screwing it down too hard.

After a bit of trial and error, I ended up going square:
Square Washers 304-A2 Stainless-Steel
Specifically, an M3 ID and 16 mm square outer. Just an alternative to bear in mind.
  Reply With Quote

Reply


Amp Camp Amp Kit V1.6Hide 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
Amp Camp #1 PCB Rudi_Ratlos Swap Meet 43 30th September 2018 12:12 PM
Amp Camp amp tttubes The diyAudio Store 3 15th November 2016 02:57 PM
Amp Camp Amp GregBaker The diyAudio Store 0 12th January 2015 12:41 AM
Amp Camp! Jason Site Announcements 2 30th June 2012 03:57 PM


New To Site? Need Help?

All times are GMT. The time now is 12:21 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio
Wiki