[Baki]

I have received a HagClock PCP and waiting eagerly to start a project.

I have also ordered necessary parts from Digi-Key but at the time of the purchase LT1016 comparator was not available.

I have a few questions:
1. Are AD8561ANZ-ND IC COMP 7NS ULTRA-FAST 8-DIP or
          MAX913CPA-ND IC COMPARATOR TTL SNGL HS 8-DIP,
           which I have ordered, acceptable replacements?

2. Do you recommend installation of IC sockets both for the opamps and comparators (for future possible replacements)?

3. What about good metal film resistors instead of carbon films?

4. Your comment if I plan to use Black Gate capacitors instead of Panasonic FC and tantalums

5. Did I understand correctly that I should use untwisted solid core wire    for VCC and VEE?

Thanks,

Baki

[hagtech]

1)  I know the MAX913 is ok.  Will look into the other.

2)  I never use sockets for such fast circuits.

3)  Metal films are lower noise.

4)  Don't replace the tantalums.  This is a clock, not an audio circuit.  Black Gates for the FCs are fine.

5)  Doesn't really matter if you twist the VCC and VEE wires.  The clock output pair is the most important.

jh

[Baki]

Thank you very much.

I would like to ask you just one more question.

Could I additionally use the power supply section of the Hagclock for the analog supply of my 5V single supply PCM1732 DAC? If possible, what would be the connection point on the Hagclock PCB?

Thanks once again and best regards,

Baki

[hagtech]

Could I additionally use the power supply section of the Hagclock for the analog supply

Maybe, if you don't draw too much current.  The ZTX449 pass transistor will start to get hot if you do.  Also depends on the voltage you start with (+8V or +15V).

You could replace the ZTX449 with a higher powered NPN with heat sink.  Or use +8V input supply.  Or use separate HagClock as just a regulator (no clock parts installed).  

jh

[Baki]

I have finally received parts from Digi-Key.
Although on the plastic bag was stated Crystal 16.9344 MHz actually, on the crystal can was written 16.9056.
Is that acceptible?
Thanks,
Goran

[hagtech]

Actually, it should be a "C56".  

jh

[Baki]

I really apologize Jim but I am afraid I didn't understand.

Can I still use this crystal for the project? It is a cylinder type (and it was propertly ordered...)

I also noticed that on the picture of the Hagclock on your web site on the crystal can was written 16.9039...

Thanks,
Goran