The YARRA Preamplifier/HPA for Melbourne DB Group Buy

[xrk971]

I was thinking pecan wood cover 🙂

Yes, that see through lexan would look cool. Acrylic might be easier to work.

 

[meanie]

Good idea, I can show off the pcb with a million VIA holes.
Lucky me i got the first batch of the Yarra pcb.

 

[Vunce]

My Yarra has been topless since birth,
I have to look inside every time I pass by it 😀

 

[TboneAK]

X you could go with pecan for the sides.... I was thinking something like that for my HPA build.

 

[meanie]

Pre order in.

Meanie - 2 boards - Singapore *Pre-order Placed*
TboneAK - 2 boards - USA *Pre-order Placed*
Batty - 2 boards - AUS *Pre-order Placed*
Carl Huff - 2 boards - USA
Mordikai - 2 boards - USA
Aljordan - 2 boards - USA
Roundtoit - 2 boards - USA
gary s - 2 boards - AUS
afoor - 2 boards - USA
bologna1 - 2 boards - USA *Pre-order Placed*

 

[batty]

My Yarra has been topless since birth,
I have to look inside every time I pass by it 😀

I'm the same with my Bi Mesmerize, all those LEDs Oooh. 😀

 

[xrk971]

Order for Korg 6P1 preamp PCBs placed. This will be a fun one.

 

[batty]

are the pins on the trimpot inline or offset, I'm trying to put together a BOM on Mouser.
Found everything except the pot.

 

[batty]

Value Pt No Designation qty
40.2 71-CMF5540R200DHR6 R101, R201 2
475k 71-CMF55475K00DHR6 R102, R103, R202, R203 4
1k 71-CMF55-D-1K/R R104, R105, R122,R204, R205, R222 6
33.2k 71-CMF5533K200DHR6 R113, R213 2
150 71-CMF55150R00DHR6 R115, R117, R215, R217 4
270k 71-CMF07270K00GKR6 R118, R218 2
10k 71-CMF5510K000DHEK R121, R221 2

1K TRIMPOT R112, R222 2

470uF 35V 647-UKW1V471MPD C101, C131, C201, C231 4
0.1uF 100V 505-MKS2D031001A00MC C106, C122, C206, C222 4
10uF 50v 647-UKW1H100MDD C113, C115, C116, C117, C118, C132 12
C213, C215, C216, C217, C218, C232
10uF 50V 505-MKS2B051001NJO00 C111, C211 2

2N7000 512-2N7000 V104, V121, V204, V221 4

LP2950-33LPRE3 595-LP2950-33LPRE3 N131, N231 2

 

[batty]

647-UKW1J471MHD is the 63v version of 470uF as 35v out of stock

 

[xrk971]

The boards are in! Does anyone have the shopping cart at Mouser etc. all worked out yet?

 

[gary s]

Hi X,

Am I missing something here as all of the other Yarra pre amp daughter boards (BA18, Melbourne and PCA) have 5 mounting holes to line up with the 5 screws on the Yarra mother card - but the Korg 6P1 DB has only 4 mounting holes as pictured. So how does it attach to the Yarra mother board?

 

[xrk971]

That’s the negative supply voltage hole that’s not needed. JPS64 needed more board real estate, so the hole was omitted. It will still be sturdy enough for mounting. That particular standoff needs to be a female screw thread - or removed all together.

 

[gary s]

Thanks X, now I just need to make sure the Yarra mother card is fitted with female threaded standoffs for the mounting of any of the daughter boards.

The Yarra pre amp is my next project in line to do.

While I am here, I may as well ask for the design of the Yarra preamp, do you know what length (height) the pcb standoffs should be, I don't think it matters as the daughter boards are not lining up with any other holes.

 

[batty]

The boards are in! Does anyone have the shopping cart at Mouser etc. all worked out yet?

Post #846, check it first though, it is my first attempt at a bom

 

[gary s]

Actually post #849 and #850 by batty for a parts list (BOM)

 

[batty]

Damn dyslexia

 

[xrk971]

Couple more folks have placed orders for the Korg 6P1 preamp.
Thanks!

 

[xrk971]

GB Status Update:
I just shipped out 7 packages for the Yarra Korg 6P1 preamp PCBs today. Some of you whom ordered it combined with the RTR SSR Protection circuit GB, both will ship together when the SSR units arrive. Those are taking so long to get built - now we know those lead time quotes might be misleading. We were told 3 weeks and it has been over 2 months. Thanks for all your patience.

 

[gary s]

Hi X, just ordered 2 of these Yarra Korg 6P1preamp daughter pcb's, can you advise when you will be sending these thanks. They can wait till the RTR SSR I have ordered are ready to go if you like.