[Milsurplus] RAL Mica caps

[Kenneth G. Gordon]

On 20 Mar 2018 at 14:05, Joe Connor via Milsurplus wrote:

> 
> I just wanted to follow up on the issue I had with the low heater voltage. As I 
> noted earlier, the problem was a shorted .01 bypass cap on the detector heater. 
> There was some question as to whether that cap was mica, as the manual states, 
> or paper, as is often the case with these older receivers.
> 
> I conducted a post-mortem on the caps in question and they are mica.

Wow! To me what is interesting about this is that 1) they really ARE mica (I never took one 
apart or ever had any trouble with any), and 2) that it shorted.

> They are 
> 7/8" by 7/8" by 1/8". The tops and bottoms are metal, and the sides show three 
> layers. They are labeled Faradon (Camden, N.J), Model T. 

Well, thank you for doing this investigation, Joe. It is very interesting!

> The mounting is interesting. All four bypass caps are stacked. Each has an eyelet 
> in the middle. A tight-fitting screw mounts them to the chassis and they are 
> grounded through that eyelet and screw.
> 
> Of the four bypass caps in my receiver, three tested fine and one had a dead 
> short. I replaced all of them. 

Good man.

And thank you for keeping us informed.

Ken W7EKB

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus