david winter
Classical music lover.
Hi,
I would like to restore an Audio Research D75A amp which has weak tubes.
The double triodes are all 6CG7 except for the 12AX7.
Since this is not so old I wanted to know if there are specific parts to replace:
- Whether the original electrolytics can be kept or are known to fail / leak (note that the quad in the middle of the bias pots are already replaced).
- Among the resistors, some have increased in value. Are there any spefici values to sort / match ?
Any help appreciated. Thanks !
I would like to restore an Audio Research D75A amp which has weak tubes.
The double triodes are all 6CG7 except for the 12AX7.
Since this is not so old I wanted to know if there are specific parts to replace:
- Whether the original electrolytics can be kept or are known to fail / leak (note that the quad in the middle of the bias pots are already replaced).
- Among the resistors, some have increased in value. Are there any spefici values to sort / match ?
Any help appreciated. Thanks !