[Drake] R-4 Queston

[Garey Barrell]

Jim -

According to the Serial Number Database at

<http://www89405.temp.w1.com/DrakeSerialDatabase.htm>

there was an R-4 s/n 1994.

The first R-4A schematic references s/n 2007.

Drake was not "iron-clad" on changes, i.e., there were at least four 
schematic versions of the R-4A, with the first one very similar to the 
R-4, (13 tubes,) and the last one very similar to the R-4B, (11 tubes.)

I have two schematics for the R-4.  One is 107640001, indicating 10/7/64 
- s/n 0001, and another, 29650001 indicating 2/9/65 - s/n 0001.  I have 
not compared them, but both have 13 tubes.

The early R-4 had some commonality with the 2-B.   Does your R-4 have a 
6X4 rectifier tube?  That could be the 14th tube.  I owned one of the 
first R-4's, ordered before they were available.

I'd be interested in any information you gather.

73, Garey - K4OAH
Atlanta


W8DRZ at aol.com wrote:

>I have an early serial number R-4 that has 14 tubes,
>I was wondering at what SN did Drake change to a 
>13 tube design with the R-4? I believe it is after
>SN 500. Also, I have never seen a R-4 with a 
>SN above 500. Can anyone help with this?
>
>Tnx
>
>Jim - W8DRZ
>  
>