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

Instruments and Amps Everything that makes music, Especially including instrument amps.

Altec-Lansing 1781AT transformer 1785 mfr?
Altec-Lansing 1781AT transformer 1785 mfr?
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 7th February 2019, 11:31 PM   #1
multi-volti is offline multi-volti  United States
diyAudio Member
 
multi-volti's Avatar
 
Join Date: May 2005
Location: Michigan
Default Altec-Lansing 1781AT transformer 1785 mfr?

Hi:

I have some early 1990's Altec-Lansing 1781AT mic preamp modules. They have the 1785 optional 600:10000 ohm input transformer.

I am curious if I can figure out whose transformers they are.

They have markings
671-9228
651AL813

My first guess would be EIA code = 671 & date code = 9228 but I cannot find an EIA Mfr. code of 671.

651 was apparently Midcom in the mid-90's. Their name turns up now associated with Wurth. I vaguely recall Midcom making telecom transformers long ago...not as exciting as finding Jensen, etc.

But I suppose they do what they do just fine...and they are already here. I can't change anything, but am curious whether they are diamonds or dogs.

They are in formed metal boxes, but the bottoms are open (wax-potted), and an open can doesn't seem like profound shielding.

Sound familiar to anyone?

Thanks

Murray
__________________
Murray
  Reply With Quote

Reply


Altec-Lansing 1781AT transformer 1785 mfr?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
Altec Lansing model 15600 transformer 600 watt 70/100 volt Dfrabens Swap Meet 0 17th June 2015 04:44 PM
altec lansing 802 8g HELP!! Quartz19208 Multi-Way 3 28th March 2013 02:18 PM


New To Site? Need Help?

All times are GMT. The time now is 04:32 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