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 Lounge A place to talk about almost anything but politics and religion.

What have you built lately?
What have you built lately?
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 3rd January 2018, 02:25 AM   #11
Tubelab_com is offline Tubelab_com  United States
diyAudio Member
 
Tubelab_com's Avatar
 
Join Date: Jul 2005
Location: West Virginia panhandle
I built a breadboard prototype for what will become a few new amplifiers. This prototype is for evaluating tubes, transformers, and operating conditions.

The first picture shows it with GE 6550A tubes making about 70WPC in triode mode. The second picture shows it with 7403 tubes making 100 WPC in triode mode.

This video shows it annoying the neighbors through speakers at full crank! AKA "4 minutes of LOUD"

YouTube
Attached Images
File Type: jpg P1000462_x.jpg (873.3 KB, 57 views)
File Type: jpg P1000468_x.jpg (918.8 KB, 55 views)
__________________
Tubelab, it's 5 year mission. To explore strange new tubes, to seek out new circuits and topologies, to boldly go where no tube has gone before......
  Reply With Quote
Old 13th January 2018, 09:57 PM   #12
VenusFly is offline VenusFly  Australia
diyAudio Member
 
VenusFly's Avatar
 
Join Date: Sep 2017
I repurposed an old digitech amplifier that only draws 6 watts at idle to amplify a cheap and nasty chinese wireless doorbell that wasn't loud enough.

I was also going to throw out a set of loudspeakers which weren't of any use to anyone but reused them for the doorbell.

Well its bloody well loud enough now! Big Ben strikes hard in our house.

I'll put it on a timer for now to save on power. But seeing as we have a solar power system here I don't see why I can't increase the power output even further and make the whole house shake whenever the doorbell is rung. *rubs chin*

I'm thinking of improving it by making up a hanging 12 inch open baffle loudspeaker that I can hang from the wall and let the wall act as part of the speaker with a high efficiency driver and running it from a SLA battery with a trickle charger. But I do have some spare 8 inch drivers laying around with a box that I could convert into an open baffle loudspeaker simply by removing the back, I just then need to stash some electronics inside of it and glue a piece of wood on the back to keep it away from the wall by a cm or two.

Last edited by VenusFly; 13th January 2018 at 10:02 PM.
  Reply With Quote
Old 13th January 2018, 10:11 PM   #13
Wavebourn is offline Wavebourn  United States
Designer & Technologist
diyAudio Member
 
Wavebourn's Avatar
 
Join Date: Sep 2006
Location: Pleasant Hill, CA
What have you built lately?
I replaced 20 faders in my mixing console. In order to do so I had to design and order PCBs.

Old faders from vintage TOA were scratchy. New ones are deadly quiet. I used double pots in parallel, for reliability.
Attached Images
File Type: jpg IMG_4143.JPG.jpg (268.2 KB, 23 views)
__________________
The Devil is not so terrible as his math model is!
  Reply With Quote

Reply


What have you built lately?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
Mouse over image to zoom Custom-built-audiophile-quality-speakers Custom-built-audi djn Swap Meet 7 21st August 2016 06:49 PM
WTB: F5 project - built or not built jdubs Swap Meet 2 11th November 2014 01:01 AM
Hi! And I built one too... The RB Chip Amps 4 13th March 2009 10:12 AM
has anyone built these? spoggles Multi-Way 2 3rd June 2004 06:50 PM


New To Site? Need Help?

All times are GMT. The time now is 12:05 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki