All the popular Leslie amps were valve (122, 145/7, 251 etc) but there were transistor amps used in other models.
The 9 series was a later popular choice in the clubs, very loud but covered in black tolex.
The Leslie 147 was the one used on many classic recordings.
Yamaha had nice RA 50/100/200 watt transistor models that all featured jack inputs.
Gilmour used to use the 200w in the 70's and early 80's. I had the 50 watt model and with it's chrome stand and castors looked
and sounded 'clean'.
The effect of the spinning sideways eliptical speaker was far more pronounced then a Leslie and would be interesting to have a profile if
anyone still has one ...?