122/147 Differnces

[Larry Thompson <lthompso@MNSi.Net>]

OK, this may well be the dweeb question of the week, but is there a 
substantial difference in the sound between a 122 and a 147 style amp? 
The very first Leslie I owned (w/and L100) was a 122. Loved the sound, 
hated the time delay for the slow>fast change. Sold that rig. My next 
rig was a B3 with a 251 that had the second channel tied to the main 
so there was a little straight tone comming out the reverb speakers. 
It wasn't a fair comparison as I had actually got my first B and was 
so excited about that that the model of Leslie wasn't a concern. All I 
knew was when I hit the speed switch it changed right away. Bonus!!
I ended up getting my orignal 122 back and have since had it converted 
to a 147 style amp to work with the B in the studio and I use the 251 
with a combo preamp and XB2 for stage.
Should I have stayed or should I return to 122 style amps? Is there a 
way to get around the switching problem? 
As a side note, on the "122 turned 147" that I use in the studio, I 
had to replace the relay so I mounted an AMF plug in style on the top 
of the chassis. Worked well, but as with the original style relay was 
noisy for recording. So I took a short piece of Leslie cable and built 
an extension for it, wrapped the relay in foam and mounted it inside 
the cabinet. Quick changes, no click! But, have I lost some tone....
Thanks for any input.
Larry Thompson
Windsor Ontario