[hpsdr] JANUS BoM

[Lyle Johnson]

Christopher T. Day wrote:
> 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]

Please check the Digikey datasheet, I think that they are really 6.6mm x 
6.6mm.  The 6.3 was probably a typo :-/

73,

Lyle KK7P
> 
> 
> 	`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
> 
> 
> 
> 



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