OpAmp Heaven

[grenert]

F5 kits

Hello!
I do not see any transistors for Q5 and Q6 in the Pass F5 kit. Should these be purchased separately?

Thanks and Happy New Year!
-J. P.

 

[jackinnj]

The Zetex 450 and 550 are included. Note that nothing ships until next week.

 

[jackinnj]

I am assembling KOP (kit of parts) for the LM4780 dual mono-boards. These include the OST connectors for power and output, Wima 10u/16V input caps (if you need them), LM4780 chip, assorted resistors etc.

http://www.tech-diy.com/Store/Chipamps.htm

 

[ccschua]

Hi jack,

may I know what does it mean "Note -- these resistors must be chassis mounted" ?

Are the kits for F5 still available ?

 

[jackinnj]

Hi jack,

may I know what does it mean "Note -- these resistors must be chassis mounted" ?

Are the kits for F5 still available ?

The Caddock MP930 and MP915, while nominally rated at 30 watts dissipate significantly less energy when not mounted on a heat sink -- here's the link to their catalog page:

http://www.caddock.com/Online_catalog/Mrktg_Lit/MP9000_Series.pdf

The F5 kits use the Ohmite TWW5 -- which has a small footprint and gets the heat off the board quite well -- if you've seen pictures on Janneman's PAX amplifier he appears to use a similar device. People have sent me their boards using radial "boutique" resistors and they are often scorched.

I have F5, F4 AND F3 kits in stock.

 

[ccschua]

Can you lift the rule that limited to 2 kit per person. We are thinking of group buy of 6 kit and can you offer combined shipping.

Can you point the link to the Janneman's PAX amp ?

 

[ccschua]

Further to the question, if buying 2 kit of F5, are the components like IRF and 2sk come as matched pairs?

 

[jackinnj]

For anyone who's interested, I have beta-matched MJ15003/4 MJL21193/4 ; MJE15030/31 -- that is, the P and N devices are beta matched.

 

[jtktam]

awesome guy to deal with.. will definitely buy more stuff in the future

-joe

 

[jackinnj]

Burning Amp parts

I was busy matching MOSFETs during the New Jersey rainy season! Ergo I am able to supply the matched sextuplets for the BA#1 output stage in either Vishay(IRF) or Fairchild flavors. I can also supply a limited number of driver stages with matched 2SJ74's...kits of parts will be available next week.

 

[ben_lesmana]

Hi Jack,

Do you still have the F5 kits?

Regards,
Ben

 

[jackinnj]

Free shipping to Denmark -- "Punching above its weight" -- until further notice.