What DC Resistance should a Fender twin OT measure?

[ValveBytes]

Hey I'm troubleshooting my OT, an Ultralinear later 70's model from a Silverface Twin, if I measure the resistance of the secondaries I get Grn to Black 00.3ohms, Grn-Yel to Black 00.2ohms and Grn-Yel to Grn is 00.2ohms this seems normal for the output side from what I have read in check on others.

But the primaries seem low? but I have no reference?

they measure

Blue to Brown 74.5
Blue to Blue-Yel 33.9
Brown to Brown-Yel 31.3
Brown-Yel to Blue-Yel 9.4

Red CT to blue 38.1
Red CT to Brown 36.4

Also TX isn't shorted from primary to secondary I have checked that
All measured with a Fluke 77

Any help would be great!

thanks guys!

[Enzo]

Why don't you tell us what you are trying to fix. In my daily amp repairs I very seldom find myself measuring resistance of the OT windings.

[Albert Kreuzer]

Hi Valvebytes,

the primary readings are perfectly normal for one of these.
And I'm with Enzo: What's the problem with the amp?

Cheers,
Albert