best to conduct that test without actually connecting xformer to Iron Pre, and doing that when you decode what's proper wire orientation
yes, you shoot to get secondaries in series, so twice their voltage from top to bottom, with proper mid potential
that would be top right pic
don't forget to revert those D5 etc. diodes to proper orientation, before proceeding with juice
yes, you shoot to get secondaries in series, so twice their voltage from top to bottom, with proper mid potential
that would be top right pic
don't forget to revert those D5 etc. diodes to proper orientation, before proceeding with juice
Quick update, relay part of circuit is working, psu part is working again (I replaced q1,q2,m1,m2 and t1,t2 as well as zd1,zd2 and m3 for relays).
So back to J1 and j2, I will take them out, after back break, to measure Idss.
FYI I already replaced P3 to no avail (I did not expect as trimming did still work).
So back to J1 and j2, I will take them out, after back break, to measure Idss.
FYI I already replaced P3 to no avail (I did not expect as trimming did still work).
Ok, Jason from the store, here I come🙂:
(used 470R gate stopper in circuit)
I couldn't resist and ordered a second IP balanced pair, albeit for the cinemags and jfets, they are rather cheap compared to EU prices!
I guess I will not try to trace back through all the F up's how the LSK170 got fried 😉
(used 470R gate stopper in circuit)
I couldn't resist and ordered a second IP balanced pair, albeit for the cinemags and jfets, they are rather cheap compared to EU prices!
I guess I will not try to trace back through all the F up's how the LSK170 got fried 😉
^ We're rooting for you!
My book of ookups is in its 4th printing. 🙂
My book of ookups is in its 4th printing. 🙂
Then I must share my most recent success:
Soldering Lt 3042 MSOP-10 with a regular iron is not easy😅 It does put out the requested 5V though!
You would think a LSK170 should be a breeze, no?
Soldering Lt 3042 MSOP-10 with a regular iron is not easy😅 It does put out the requested 5V though!
You would think a LSK170 should be a breeze, no?
Nice work RDW 😉
Just make sure you clean off the flux residue with 90% Iso alcohol and an old toothbrush.
Just make sure you clean off the flux residue with 90% Iso alcohol and an old toothbrush.
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That is some precision work done with a lighter! 😉 Nice job!
^ 
I was thinking the same thing... but I was picturing Aqua Net and a lot flux tossed into the mix. Hmmmmmmmm.
I was thinking the same thing... but I was picturing Aqua Net and a lot flux tossed into the mix. Hmmmmmmmm.Hi ZM,
In previous posts you had suggested loading resistors between the output and G.
This seems to work very well. I experimented with 47k to 100k and settled on the 100k; removed the slight edge that was there. Thank you!!
Does it make any sonic difference whether I did the resistor loading at the buffer output or at the Cinemag output. I am following the Cinemag output with a Slagle AVC.
nash
In previous posts you had suggested loading resistors between the output and G.
This seems to work very well. I experimented with 47k to 100k and settled on the 100k; removed the slight edge that was there. Thank you!!
Does it make any sonic difference whether I did the resistor loading at the buffer output or at the Cinemag output. I am following the Cinemag output with a Slagle AVC.
nash
you can have some sort of effect loading directly buffer output (deliberately increasing THD) and other sort of effect loading Cinemag output - taming if there is some overshoot with your load (amplifier)
though - in your boots - I would connect Slagle AVC in place of Cinemag, as I already explained in several instances
I like Iron, but sometimes is worthy trying to eliminate redundant one
then leave what you like more - less or more Iron in signal path
though - in your boots - I would connect Slagle AVC in place of Cinemag, as I already explained in several instances
I like Iron, but sometimes is worthy trying to eliminate redundant one
then leave what you like more - less or more Iron in signal path
At present, the 100k is at the buffer output.
I have wired the IP SE out so that I can listen to buffer + AVC or buffer + 6db Cinemag + AVC.
The sound is good with the buffer alone but a shade bright and uninvolving; but add in the Cinemag and its wonderful. Dimensionality, textural quality is in another league altogether.
I have wired the IP SE out so that I can listen to buffer + AVC or buffer + 6db Cinemag + AVC.
The sound is good with the buffer alone but a shade bright and uninvolving; but add in the Cinemag and its wonderful. Dimensionality, textural quality is in another league altogether.
there is nothing to hear, regarding difference in buffer loading, until you approach 15K and down
more likely 10K and down
I'm glad to hear that you like it with more Iron in signal chain
more likely 10K and down
I'm glad to hear that you like it with more Iron in signal chain
well, no pressure there - matter of choice
Iron Pre with deleted pot, followed with AVC - what's not to like
Cinemag/less - just more to play with and choose from
Iron Pre with deleted pot, followed with AVC - what's not to like
Cinemag/less - just more to play with and choose from