Hey, I'm trying something different here, so I don't know if this post will work, but.
I picked up some old scientific equipment and it had three pretty little transformers in them that were feeding the grids of a 12AX7 from a low level input. Actually it was part of a lie detector. So I've not had the best luck in the past testing transformers and it continued today as my ancient bench equipment kept telling my it needed a little more attention.
So anyway I put the transformer on the analog outs of a MOTU 2408Mk2 and took the output of the transformer back into the analog inputs. I used RMAA5.5 to analyze. Is this going to give me valid data? So this is what it spit out. There are three taps on the primary and a CT secondary. Pic is of the frequency response of the three. Transformer secondary was loaded only by the input impedance of the 2408, except the highest step up that I had too add a 30k resistor in parallel to keep it from clipping the 2408 input. I couldn't handle it in a more elegant way, but that's another story.
image
syntax changed by moderator -PRR
Let me know if this post is screwed up or if the picture doesn't show, as I have not tried posting one here before and all forums seem to work differently.
What do you think? Will this kind of test give quality data? Of the responses?
Thanks,
Michael
ps, what the heck is wrong with html. I don't think this image is going to post so if you could tell me what is wrong with the syntax above, I would appreciate it.
editartially fixed link
I picked up some old scientific equipment and it had three pretty little transformers in them that were feeding the grids of a 12AX7 from a low level input. Actually it was part of a lie detector. So I've not had the best luck in the past testing transformers and it continued today as my ancient bench equipment kept telling my it needed a little more attention.
So anyway I put the transformer on the analog outs of a MOTU 2408Mk2 and took the output of the transformer back into the analog inputs. I used RMAA5.5 to analyze. Is this going to give me valid data? So this is what it spit out. There are three taps on the primary and a CT secondary. Pic is of the frequency response of the three. Transformer secondary was loaded only by the input impedance of the 2408, except the highest step up that I had too add a 30k resistor in parallel to keep it from clipping the 2408 input. I couldn't handle it in a more elegant way, but that's another story.
image
syntax changed by moderator -PRR
Let me know if this post is screwed up or if the picture doesn't show, as I have not tried posting one here before and all forums seem to work differently.
What do you think? Will this kind of test give quality data? Of the responses?
Thanks,
Michael
ps, what the heck is wrong with html. I don't think this image is going to post so if you could tell me what is wrong with the syntax above, I would appreciate it.
editartially fixed link