Thanks for the replies.
The 184 is up and running. Who ever had been into it turned it into a real mess 5 other transistors on the countdown board had been replaced with the wrong parts.
Everthing else in the unit looks original with no repairs to any of the boards.
The only thing I notice is the 1us marker is slightly higher in amplitude versus the other markers. ~ 1.95v vs `1.5v on the other markers.
I am thinking the 3251 A vs a regular 3251 in Q134 is the cause?
Thanks again.
B
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--- In TekScopes@..., "andersen_bill@..." wrote:
I am repairing a 184 that has had transistors removed from the countdown board.
I am looking at;
Q104
Q114
Q134
SM says "selected from 2N3251"
I can get 2N3251A's local.
I looked at the data sheets. Specs are close. Looks like the A has higher ratings.
Does anyone know if they will work or do I need the non A part?
TIA
B
