I have a decent example of a 600T I'm restoring for a friend and colleague.
He is a Fisher collector, and really wants this as good of a performer as I can get it.
It needs every cap replaced, they are all leaking to some degree.
Even with all the leaky caps, it still functions.
The issue is the mist-mash of output transistors.
I've got four the original 35144's. I've read in a couple posts these are NTE/ECG 121 equivalents.
Can anyone confirm that?
In the unit there were two with the numbers rubbed clean off (case top is totally different) a shorted 35144 and a shorted part with obscured numbers, half of which reads: GF-9 USA 1012 403
Going on the assumption 121 is the right match I tried two of the 35044's along with the 35144's. I can't set the bias or offset, but it sounds ok and runs cool
The side with two 35144's and the unmarked parts runs 10º hotter, again the bias and offset can't be set.
If NTE121 is the right match I have a handful of 121's: one HEP 232, three 2N350A (Motorola), three 35044 (RCA)
Normally I would graph them all out on the PEAK tester, but it doesn't even recognize Germanium parts: "No Component Connected"
Does anyone have the data sheet for a 35144?
Off topic: I inherited a pristine example of a 600T from the estate of my old boss. He bought it new in 1965.
I recapped it for him years ago, his wife thought I should have it.
I am very impressed at how good this thing sounds. The 45 watts/channel claim is no exaggeration.
He is a Fisher collector, and really wants this as good of a performer as I can get it.
It needs every cap replaced, they are all leaking to some degree.
Even with all the leaky caps, it still functions.
The issue is the mist-mash of output transistors.
I've got four the original 35144's. I've read in a couple posts these are NTE/ECG 121 equivalents.
Can anyone confirm that?
In the unit there were two with the numbers rubbed clean off (case top is totally different) a shorted 35144 and a shorted part with obscured numbers, half of which reads: GF-9 USA 1012 403
Going on the assumption 121 is the right match I tried two of the 35044's along with the 35144's. I can't set the bias or offset, but it sounds ok and runs cool
The side with two 35144's and the unmarked parts runs 10º hotter, again the bias and offset can't be set.
If NTE121 is the right match I have a handful of 121's: one HEP 232, three 2N350A (Motorola), three 35044 (RCA)
Normally I would graph them all out on the PEAK tester, but it doesn't even recognize Germanium parts: "No Component Connected"
Does anyone have the data sheet for a 35144?
Off topic: I inherited a pristine example of a 600T from the estate of my old boss. He bought it new in 1965.
I recapped it for him years ago, his wife thought I should have it.
I am very impressed at how good this thing sounds. The 45 watts/channel claim is no exaggeration.
