[Hallicrafters] monitoring cw

[mac]

I ran into severe cross and intermodulation problems with electronic T- 
R switches when I lived near a strong AM BC station a while back.

Dennis D.  W7QHO
Glendale, CA

******************
On Jan 24, 2014, at 9:04 PM, W7FE wrote:

> Hi Bob,
>
> I've always been a fan of the 'Electronic T-R Switch'.  Commercially  
> made by EF Johnson and B&W, but a fun homebrew project as well, its  
> single tube (plus rectifier)  design provides a few db of gain while  
> receiving and effectively cuts off the signal to the receiver when  
> transmitter RF is present. However, just enough RF passthrough is  
> available to provide a monitor signal without overloading most  
> receivers. You even get to listen to your own clicks, chirps, and  
> signal 'shape' as heard by the receiving station(s).
>
> Some folks used to report increased TVI when using  these things,  
> but I've found them to be trouble free in my stations since 1960. In  
> fact, I've been using the EFJ model to successfully feed all the  
> receivers in my current 'system' since about 2004 and have had no  
> RFI issues.
>
> 73 de Stu, W7FE
> Henderson, NV
>