[time-nuts] Frequency counter recommendation

Bob Camp lists at rtty.us
Sun Dec 19 00:06:08 UTC 2010


Hi

That's certainly the conclusion the TAPR guys came to. As they have found out, you need to do a run of hundreds to make it worth doing. Having a pro do it eliminates a whole lot of constraints on parts and sources.

Bob


On Dec 17, 2010, at 4:31 AM, David C. Partridge wrote:

> If your spend is in that sort of region it doesn't cost a great deal more to get a batch of boards professionally pasted, picked, placed and reflowed. 
> 
> Regards,
> David Partridge
> 
> 
> -----Original Message-----
> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of Bob Camp
> Sent: 16 December 2010 19:20
> To: 'Discussion of precise time and frequency measurement'
> Subject: Re: [time-nuts] Frequency counter recommendation
> 
> Hi
> 
> Yes indeed, been there done that. Not very hard at all.
> 
> All you need is the six layer pc board (can be bought), the FPGA (Digikey has them), a few of these and a couple of those. Spend less than $100 and you are in business if the PC board volume is high enough. 
> 
> In this case the next step in the business is to solder the 256 ball 1 mm spacing BGA package down on the pc board. Not so easy without the right tools...
> 
> Bob
> 
> 
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