![Picture](/uploads/8/9/7/7/89778727/published/genrad-687-a-s-112-tn.jpg?1614039116)
Manufacturer: General Radio Company (USA)
Model: 687-A, S#112
Vintage: 1935
Purpose: General Purpose
Condition: Rebuilt
Comments:
This 687-A was completely modified inside and the outside was riddled with extra holes and tape. I decided to gut it completely and mount a "modern" scope circuit inside. Now it can be used as a monitor scope at least. Therefore the inside is not worth any pictures. I tried to rebuild the outside as much as possible.
Only because it is such a rare and historically important unit, I spent so much time on it and post at least a few pictures of it.
Model: 687-A, S#112
Vintage: 1935
Purpose: General Purpose
Condition: Rebuilt
Comments:
This 687-A was completely modified inside and the outside was riddled with extra holes and tape. I decided to gut it completely and mount a "modern" scope circuit inside. Now it can be used as a monitor scope at least. Therefore the inside is not worth any pictures. I tried to rebuild the outside as much as possible.
Only because it is such a rare and historically important unit, I spent so much time on it and post at least a few pictures of it.
Documentation:
![](http://www.weebly.com/weebly/images/file_icons/image.png)
gr_687-a_ad1935.jpg | |
File Size: | 476 kb |
File Type: | jpg |