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AKSA's Lender Preamp with 40Vpp Ouput GB
AKSA's Lender Preamp with 40Vpp Ouput GB
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Old 5th December 2017, 08:24 PM   #61
pcgab is offline pcgab  United States
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AKSA's Lender Preamp with 40Vpp Ouput GB
Quote:
Originally Posted by xrk971 View Post
I am having a hard time sourcing the little cylindrical 0204 MELF SMT resistors from Mouser or Digikey in the USA. Does anyone have a vendor that has these in stock? I may have to improvise with 0805 chip resistors.
I tried Farnell, and they wanted way too much for shipping. Mouser and Digikey didn't carry more than a few values of the needed resistors.

I've not found a source yet.
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Old 5th December 2017, 09:56 PM   #62
xrk971 is offline xrk971  United States
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AKSA's Lender Preamp with 40Vpp Ouput GB
Mira in Germany has it in stock. Wonder what shipping is.

http://www.mira-electronic.de/mira/s...4_minimelf.pdf

I think 1206 chips should fit on the pads (slightly smaller).
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Old 5th December 2017, 10:03 PM   #63
pcgab is offline pcgab  United States
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AKSA's Lender Preamp with 40Vpp Ouput GB
Quote:
Originally Posted by xrk971 View Post
Mira in Germany has it in stock. Wonder what shipping is.

http://www.mira-electronic.de/mira/s...4_minimelf.pdf

I think 1206 chips should fit on the pads (slightly smaller).
I'll check them out later tonight. Thank you for the link X!
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Old 6th December 2017, 03:56 AM   #64
pcgab is offline pcgab  United States
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AKSA's Lender Preamp with 40Vpp Ouput GB
Checking Octopart API:

MMA02040C1001FB300 — Octopart

Distrelec seems to have some, I'm going to try and order some from them.
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Old 6th December 2017, 07:51 AM   #65
xrk971 is offline xrk971  United States
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AKSA's Lender Preamp with 40Vpp Ouput GB
Pcgab,
Let us know how that goes. For the purposes of verifying the PCB I will have to improvise with 0805’s chip resistorsfor for now.

Btw, I think a standard (smaller type) 1/4w or 1/8w carbon film or metal film axial can have leads bent to fit an SMT MELF package?
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Last edited by xrk971; 6th December 2017 at 07:54 AM.
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Old 6th December 2017, 01:49 PM   #66
vanofmonks is offline vanofmonks  United States
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Hi I would like 1 set TH pn gb2. Thanks
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Old 6th December 2017, 06:16 PM   #67
pfisla is offline pfisla  Switzerland
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Hi, pls put me down for 1 set TH
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Old 6th December 2017, 06:29 PM   #68
xrk971 is offline xrk971  United States
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AKSA's Lender Preamp with 40Vpp Ouput GB
GB Status Update

Quote:
PS64 - 1 set SMT, Paid
Redarc12 - 1 set, TH, Paid
CFT - 1 set, TH, Paid
Jacques Antoine - 1 set TH, Paid
Silasmellor - 1 set THT, Paid
Bvtrinh- 1 set TH, Paid
bvtrinh - 1 set TH (second set), Paid
ggetzoff - 1 set TH, Paid
tubesguy - 1 set TH, Paid
Aatto - 1 set SMT, Paid
Mordikai - 1 set TH, Paid
Johnny2Bad 2 sets total 1 TH & 1 SMT, Paid
vvs07 - 2 sets TH, Paid
PCGAB - 1 Set SMT, Paid
Harry3 - 1 set MB plus TH, Paid
Wayne1 - 1 set TH, Paid
obh - 1 Set TH, Paid
PJN - 1 set TH, Paid
Zman01 - 1 set SMT, Paid
AKSA - 1 set SMT, Paid
xrk971 - 1 set SMT, Paid
spind - 1 set TH, Paid
schlomoff- 1 set TH, Paid
Prasi - 1 set TH, Paid
muthumuthiah - 1 set TH, Paid
Algar Emi - 1 set, TH, Paid
Kokanee - 2 sets, 1 TH and 1 SMT, Paid (moved up from FB2)

—— List for GB #2 - please add name below ——

*Thimios - 1 set SMT, Need PayPal address
*Fabian85 - 1 set SMT - need PayPal address
Pinnocchio - 1 set SMT, Paid
Mituisho - 1 set SMT, Paid
Alurudin - 1 set TH, Paid
muthumuthiah - 3 sets all TH, ship all with order from GB #1, Paid
jwjarch - 1 set TH, Paid
briansz - 1 set TH, Paid
steefdebruijn - 2 sets TH + spare set SMT daughterboards, Paid
jmc207 - 2 sets: 1 TH and 1 SMT; +1 spare set TH daughterboards, Paid
*marcus22ch - 2 sets SMT, Invoice sent
*vanofmonks - 1 set TH, Please send PayPal address
*pfisl - 1 set TH, please send PayPal address
GB#2 at 18 sets so far
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Last edited by xrk971; 6th December 2017 at 06:33 PM.
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Old 6th December 2017, 06:55 PM   #69
pcgab is offline pcgab  United States
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AKSA's Lender Preamp with 40Vpp Ouput GB
Quote:
Originally Posted by xrk971 View Post
Pcgab,
Let us know how that goes. For the purposes of verifying the PCB I will have to improvise with 0805ís chip resistorsfor for now.

Btw, I think a standard (smaller type) 1/4w or 1/8w carbon film or metal film axial can have leads bent to fit an SMT MELF package?
Distrelec didn't have them afterall.

I was planning on trying to fit some 1/4w metal film axial's once the boards arrive.
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Old 7th December 2017, 11:02 AM   #70
xrk971 is offline xrk971  United States
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AKSA's Lender Preamp with 40Vpp Ouput GB
Default GB #1 PCB's Arrived!

The boards arrived and they look great. I have never had such a big heavy shipment before - amazing how much FRP, copper, and lead weighs.

Again, thank you to Aksa for the design and JPS64 for the layout! This is truly a superb "professional" layout - very similar to what you would see in a final end-product. You will notice extensive use of copper pours/ground planes, separation of signal and power ground planes, nice connectors to allow the boards to be placed in the users' case with the most flexibility as to where input/output jacks go, etc.

I think I will have to separate the mother and smaller break-way sub-boards in order for it to fit in a reasonable size package for shipment. As is, the MB is a little over 6.2in x 6.2in square shape which is an odd size to fit in a standard padded envelope.

Here are some photos...

AKSA's Lender Preamp with 40Vpp Ouput GB-aksa-lender-pcb-delivered-01-jpg

AKSA's Lender Preamp with 40Vpp Ouput GB-aksa-lender-pcb-delivered-02-jpg

AKSA's Lender Preamp with 40Vpp Ouput GB-aksa-lender-pcb-delivered-03-jpg

AKSA's Lender Preamp with 40Vpp Ouput GB-aksa-lender-pcb-delivered-04-jpg

For the purposes of testing out the boards, I will install the essential parts and leave off the connectors etc as I don't have them yet. But I should be able to verify that the preamp circuitry, cap Mx, etc all works. I am waiting for my order of the essential parts like DN2540, BSP129, electrolytic caps to arrive.
Attached Images
File Type: jpg Aksa-Lender-PCB-delivered-01.jpg (439.8 KB, 266 views)
File Type: jpg Aksa-Lender-PCB-delivered-02.jpg (479.1 KB, 264 views)
File Type: jpg Aksa-Lender-PCB-delivered-03.jpg (351.3 KB, 265 views)
File Type: jpg Aksa-Lender-PCB-delivered-04.jpg (452.5 KB, 387 views)
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Last edited by xrk971; 7th December 2017 at 11:05 AM.
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