ZM's 2SK2087C musings, phase two - SissySIT (42) as a cradle

[Zen Mod]

trimpots at buffer are 100R

easily seen on schematic, first page of thread, each in parallel with 39R

 

[JKiriakis]

Re: the Handy Addendum PS capacitor board:

Anyone know a suitable NTC that neatly fits into the PCB? CL-60 leads and body too big.

 

[Zen Mod]

10-12mm Dia

no other criteria needed

well, 10-15R

 

[Monk55]

Digikey 495-2092-nd

 

[JKiriakis]

Thank you gentlemen.

 

[JKiriakis]

Schurter integrated switch/mains fuse unit inbound as well as 5U/500mm Modushop chassis.

How is best to connect two 16 gauge wires to a single pole of the switch as shown below?

And since I will use two AS-3218 donuts, what is the best method to splice the main / neutral wires back from each channel's fuse to the Handy Addendum NTC PCB's?

 

[Monk55]

I drilled and extra hole in the schurter tab…but I also solder all connections.

 

[Monk55]

Oh….wait. Should be able to twist & fit the mains ntc pcb…?! Dual 16 gauge?!

 

[Zen Mod]

How is best to connect two 16 gauge wires to a single pole of the switch as shown below?

isn't that exactly visible from pic? two wires soldered together to switch tab

what is the best method to splice the main / neutral wires back from each channel's fuse to the Handy Addendum NTC PCB's

one wire going from switch to NTC pcb
one wire going from fuse to NTC pcb
make bridges from one section on NTC pcb to other

or make intermediate connection block bolted on base plate, then multiply wires as you wish

 

[Zen Mod]

two wires soldered together to switch tab

which means - prepare (clean) switch tab - preferably apply some flux on it, apply some solder

prepare wire ends - with or without flux, apply solder on wire ends

use wide solder iron tip, say 7mm wide chisel, crank temp to max

bring wires to switch tab, take some solder on solder tip, lean solder tip on wires and tab, as soon solder from tip flow down, liquifying rest, you're done

plasticky housing of switch demands fast and efficient soldering

anyhow, I learned all that after just dozen or two melted various plasticky things

more or less costly

I'm fast learner

 

[Zen Mod]

or be a chicken and use fastonwhateverthey'recalled connectors

 

[JKiriakis]

Faston not the sporting approach, will follow your playbook and report again.

 

[Monk55]

Apply power soon…
This is sure habit forming.

 

[Zen Mod]

 

[Zen Mod]

acorn nuts are nice funny touch

 

[Zen Mod]

in other words, acorn nuts are nutz

 

[JKiriakis]

Speaking of nuts dug out original 13mm Fiat to affix Ducati caps to floor tray.

 

[Zen Mod]

squeeze them all as much you can to middle of the base plate, every cm counts

you'll be happy later, doing tweedleefeedly with trimpots

even using just 4cm long mini screwdriver, when space it's tight, it' too tight

bridges - reminder - thermal paste, split washers - or safety nuts

you can squeeze NTC board(s) between Donuts, longitudinally is probably better

 

[JKiriakis]

Re-mounted CLC as in board as possible. Yes I can see your point about interference with trim pots.

Bridges do have thermal paste and lock washers. NTCs in tandem as you suggest.

 

[Zen Mod]