Johnson Messenger 123

[W4OP]

Does anyone have a part number for replacing the Driver and PA transistors in the 123 series. The Johnson manaul simply lists the in house part numbers.
Thanks,

Dale

 

[RatsoW8]

Do the parts themselves have any markings on them other than what's listed in the parts list?

 

[unit_399]

W4OP -

These are your best bet: 2SC781 - Driver, and 2SC799 - Final. Use original Toshiba transistors only, They're available from RF Parts, and they'll perform as well or better than the original Johnson pieces. DON'T use aftermarket (ECG, NTE, ect.) replacements, as they are usually short on power gain, and will be a big disappointment. 73s.

- 399

 

[W4OP]

Messenger 123

Thanks to all. I see the 2SC799 at RF Parts but not the 2SC789.
With that said I bought a parts radio for $5.00 - hopefully it will have a good TX chain.

Tnx guys,

Dale