View Single Post
Old 22nd Oct 2019, 12:59 pm   #9
FRANK.C
Heptode
 
FRANK.C's Avatar
 
Join Date: Feb 2006
Location: Roscommon, Ireland
Posts: 732
Default Re: David Robinson's System A modulator

Bill, thanks for reopening it.


I have built a second version of this modulator and have made some changes to it.
I have changed the test card to one in the style of a PM5544, I have moved the audio gain control to the front panel and have fitted toggle switches for selecting test card and test tone.
If anyone would like to build one all the files that are required can be downloaded here.

Frank
Attached Thumbnails
Click image for larger version

Name:	vol a.jpg
Views:	236
Size:	74.3 KB
ID:	192234   Click image for larger version

Name:	vol b.jpg
Views:	252
Size:	132.3 KB
ID:	192235   Click image for larger version

Name:	vol c.jpg
Views:	245
Size:	67.3 KB
ID:	192236   Click image for larger version

Name:	20191001_140958-1_resized.jpg
Views:	257
Size:	71.7 KB
ID:	192237  
__________________
FRANK.C is offline