Yes, there were several depending on when they were builtknow there were different Transistors used in them mine have 2SC2879
I had 2 of them around here somewhere they are clean and outstanding!!! I know there were different Transistors used in them mine have 2SC2879 I believe but seen them with SD1446 aswell. I take it those are 2879's in yours there? I couldnt tell.
I have one of these I would sell if the price is right. It has been hooked up once to test it and it is a high drive unit. 4 watts in get you about 100 watts at the CN- 801 meter.Nice find... Been looking for a mint condition silver streak 150 for several years now. used to have one back in the 80's is the only reason why. Came close a few times but never in mint condition. congrats on the cobra.