From: Garey Barrell 
Subject: Re: [drakelist] R4B vs R4c


Garey Barrell  made an utterence to the drakelist gang
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Both the B AND C lines have a "roofing filter" in the first IF.  The 
difference is in the second IF, where the B uses L-C filters in the 
Passband Tuner and the C uses crystal filters.

73, Garey - K4OAH
Atlanta

Drake C-Line Service Manual
http://hr99.home.mindspring.com/R-4C_Servicez/>



Eric Webner wrote:

> Hi Jim,
>  
> Years ago, my college radio club (Case Amateur Radio Club - W8EDU) had 
> both a C-line and a B-line. The C-line was considered the better 
> station. I presently have a C-line and recognize that the performance 
> is much better than the B-line. One thing I know of is that the C uses 
> a crystal filter in the first IF (newer radios call this a "roofing 
> filter.") This goes a long way to increasing the receiver's dynamic 
> range. Operationally, it can hear stations that other radios will 
> never pick up. The B-line uses, I believe, an RC circuit in the first IF.
>  
> I am sure that the experts on the list will have many more 
> comparisions to make for you.
>  
> 73,
>  
> Eric KA8FAN
>
>
> */"James E. Lanier" /* wrote:
>
>     I would like to hear from those of you who have used both. What
>     are your opinions?
>      
>     1) Electrical Performance Comparisons
>      
>     2) Mechanical performance (PTO tuning etc.)
>      
>     Thanks,
>      
>     Jim N4BPM
>
> ------------------------------------------------------------------------

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