[hpsdr] JANUS BoM

[Christopher T. Day]

Lyle,

I told you there'd be more questions.

How much leeway, if any, is there in the package size for C22, C23, C24,
C25, the audio grade 220uf 6.3 electrolytics? Your spreadsheet has them
listed as 6.3mm by 6.3mm, where the data sheet has them with a footprint
of 6.6mm by 6.6mm with 7.2 listed as the lead extension and 5.2mm
height. The closest Mouser equivalent I can find has a footprint of
8.3mm by 8.3mm with 9.0mm for lead extension and 6.7 mm height. [Mouser
part # 661-PXA6.3VC221M]


	`Chris - AE6VK, moving slowly through the BoM



-----Original Message-----
From: Lyle Johnson [mailto:kk7p at wavecable.com] 
Sent: Wednesday, May 31, 2006 10:17 AM
To: Christopher T. Day
Cc: H. Gruchow; hpsdr at hpsdr.org
Subject: Re: [hpsdr] JANUS BoM

Hello Chris!

> 1) Do the 2700 pf capacitors need to be COG? The only COG version
Mouser
> seems to have around comes in minimum units of 4000.

This is part of the sigma-delta roll input filter, probably doesn't have

to be C0G. Since it is in the critical signal path and could have some 
impact on phase drift with temperature I elected to use a C0G part.

> 2) Should the 0.22 pf capacitors be COG? They are not marked so on
your
> list.

I think you meant 0.22 uF, and I bought Mouser 77-VJ0805Y224KXJTBC for 
my alpha build.

73,

Lyle KK7P