I have recently purchased the following Unbalanced to Balanced Convertor boards but the vendor now tells me that he has lost the parts list.
Can anyone help ?
K.G-dynahibal KG Kevin Gilmore Unbalanced to balanced preamplifier PCB | eBay
Can anyone help ?
K.G-dynahibal KG Kevin Gilmore Unbalanced to balanced preamplifier PCB | eBay
Might find something here, not sure:
DIY RESOURCES - Kevin Gilmore DYNAMIC HEADPHONE AMPLIFIERS and POWER SUPPLIES
I linked the Wayback Machine archive because the current site seems to have adware or something it tries to push.
Looks like it's not on that page, but maybe someone on head-fi knows.
DIY RESOURCES - Kevin Gilmore DYNAMIC HEADPHONE AMPLIFIERS and POWER SUPPLIES
I linked the Wayback Machine archive because the current site seems to have adware or something it tries to push.
Looks like it's not on that page, but maybe someone on head-fi knows.
It's likely these; not sure where you'd get them:
THAT Corporation 300-series Low-Noise Matched Transistor Array ICs
Likely the THAT 340.
THAT Corporation 300-series Low-Noise Matched Transistor Array ICs
Likely the THAT 340.
I'm trying to search for a quad transistor array with 2 x NPN and 2 x PNP but I'm drawing a complete blank.
Sorry for an OT but this is my new buddy, Hermes
Attachments
Best place I know of to go look for info, and ask questions
Do It Yourself - www.Head-Case.org
Do It Yourself - www.Head-Case.org
Sorry for an OT but this is my new buddy, Hermes
Awesome!
Take a look at this thread.
Balanced to unbalanced board - Do It Yourself - www.Head-Case.org
There is a BOM for the SMD version, but not for the thru-hole.
The ebay vendor that ripped these boards off (though Kevin doesn't seem to mind) should be able to supply a board to support their "product". The BOM would have been a spreadsheet. How do you lose it?
Balanced to unbalanced board - Do It Yourself - www.Head-Case.org
There is a BOM for the SMD version, but not for the thru-hole.
The ebay vendor that ripped these boards off (though Kevin doesn't seem to mind) should be able to supply a board to support their "product". The BOM would have been a spreadsheet. How do you lose it?
Thank you for that, it answers all my questions.
The THAT340s are available from Farnell.
Take a look at this thread.
Balanced to unbalanced board - Do It Yourself - www.Head-Case.org
There is a BOM for the SMD version, but not for the thru-hole.
The ebay vendor that ripped these boards off (though Kevin doesn't seem to mind) should be able to supply a board to support their "product". The BOM would have been a spreadsheet. How do you lose it?
He reckons his Hard Drive failed.
Probably not. The "right" values are:
50k = 49k9
3k0 = 3k01
5k0 = 4k99
700R = 698R
Depending on where the resistors are located you can probably get away with a few percent off (value + tolerance). Because it is a differential circuit, in some places the matching between sides is probably a lot more important than the absolute value.
50k = 49k9
3k0 = 3k01
5k0 = 4k99
700R = 698R
Depending on where the resistors are located you can probably get away with a few percent off (value + tolerance). Because it is a differential circuit, in some places the matching between sides is probably a lot more important than the absolute value.
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
- Home
- Amplifiers
- Solid State
- Kevin Gilmore