All as I remember. Yes, you can use the receiver or transmitter VFO, assuming you have all the cables connected in back (there are several, I seem to recall at least four, all RCA plugs). Of course, you'll have to remember to set the band switch on both receiver and transmitter regardless. So you'd set the band switch on both radios, as well as setting the mode on the transmitter. On the receiver, you'd set the bandwidth, and either have the radio set on AM or, well, not AM, with either slow or fast AGC or no AGC. Tune the preselector on the receiver for a peak in noise. You'd also need to tune a similar control on the transmitter, peak the drive control, and tune as usual. Ah, good times. Wouldn't mind a set of Drake twins again myself, what a great receiver that R4B was. Good times. 
--
Buddy Brannan, KB5ELV - Erie, PA
Phone: (814) 860-3194 or 888-75-BUDDY



On Dec 9, 2011, at 9:54 AM, Pat Byrne wrote:

> As I remember Mike you would change modes on both the transmitter and 
> the receiver.  Frequency can be made to follow one VFO, either in the 
> transmitter or the receiver but mode selection is done 
> independently.  And you would use one antenna - there is a switching 
> circuit in the transmitter.
> Pat, K9JAUAt 08:35 AM 12/9/2011, you wrote:
>> Hi Curt and all:
>> 
>> When changing modes on twins, did you change on both the transmitter 
>> and the receiver or did it depend on if either if the transmitter 
>> had control or if the receiver had control? Would I have to use two 
>> separate antennas?
>> 
>> 73:
>> Michael
>> 
>> Sent from my iPhone