FERAL's imPERFect LAYOUTS

[Feral Feline]

I can, but I'm not sure you could find it on your own — Ap Lui Street's street-market stalls do a good job of hiding the store-fronts ... you'd never spot the store for the stalls.

It's best to have someone who already knows where it is take you there, nightmare to find on your own.

If you must lone-wolf it, I recommend going by MTR; take exit A2 and go across the street kitty-corner, turn right. Take the sidewalk immediately in front of the stores behind the stalls, if you stay out on the street between the stalls, you'll miss it for sure. It's about 1/3 the way down the street on the left-hand side... Pic will help:

This is the view after coming out of MTR Exit A2,
See the green enclosed-balcony in the upper right of the pic? The entrance to the shop is street level just below and about 6 shops (not stalls) beyond that.


This is where I got most of my perf:

That's just the entrance, you have to go in and up a flight of stairs to get to the goodies.

There's a few other shops where I got perf, maybe even a bit cheaper, but this is probably the biggest shop and has a good selection of caps, transistors, diodes, switches, etc, too — great selection of instrument and mic cable, spools of Belden, Sommer and Canare etc so get as much or little as you need, but alas no Mogami. I tended to do most of my shopping there when I couldn't get what I wanted from Tayda.

WECL is the English name of the shop, but the English-side of WECL's website... needs sprucing up. I've tried to order online, but without any success.

Man I miss that street. Nothing like it here. Nothing like it in all of Canada.
I'm running low on perf, but won't be back in Hong Kong until about a year from now... I could take you there, then.

@VanWhy, @Sidney and/or anyone else...

I'll be in HK in a week, for two weeks, 29th to Feb 12; happy to show anyone visiting/living there my favourite haunts on Aplui Street!

 

[Feral Feline]

Inspired by @mybud's permanent-breadboard Holy Roller build, I planned to follow suit and drop the circuit onto a solderable-breadboard...


...but I had 0Ω to resist the siren-call of the enchanting-perf.



I've yet to see a layout that doesn't require jumpers, and the vero for it has way too many cuts&jumpers for my druthers.
I'm quite happy with the way this turned out; one of my goals was no jumpers/links — mission accomplished!
Now I need to build and verify it.





This layout is for 1590N1 with top-jacks, but I bet you could squeeze it into a 1590B2 with top-jacks — especially if you tighten up LEVEL with a 9mm pot.

Also, with some minor re-kajiggering in the lower-left corner, you could use the 2SK117 with its DGS pinout.


If you use this layout and verify it then let me know, SVP.

Peace, Love, and Limiting
FF


PS: I changed Q1 to something similar that's still available, the unobtanium MPF102's drop-in replacement (at least in most cases) is a J113.

 

[Feral Feline]

Inspired by @mybud's permanent-breadboard Holy Roller build, I planned to follow suit and drop the circuit onto a solderable-breadboard...


...but I had 0Ω to resist the siren-call of the enchanting-perf.



I've yet to see a layout that doesn't require jumpers, and the vero for it has way too many cuts&jumpers for my druthers.
I'm quite happy with the way this turned out; one of my goals was no jumpers/links — mission accomplished!
Now I need to build and verify it.


View attachment 112436


This layout is for 1590N1 with top-jacks, but I bet you could squeeze it into a 1590B2 with top-jacks — especially if you tighten up LEVEL with a 9mm pot.

Also, with some minor re-kajiggering in the lower-left corner, you could use the 2SK117 with its DGS pinout.


If you use this layout and verify it then let me know, SVP.

Peace, Love, and Limiting
FF


PS: I changed Q1 to something similar that's still available, the unobtanium MPF102's drop-in replacement (at least in most cases) is a J113.

Apparently I wasn't quite as happy as I thought.

OH, and I forgot to mention I added a Pull Down Resistor to the thing.


Anyway, I thought things were a bit tight between some of the components, so I spread things out and yet now have a SMALLER board!

Really? How many clowns can I fit inside this clown-car?

I tried to keep things straight and linear, but I added buncha little nitpickin' such as dog-legs to C1 to give it some air from Q1, and I wanted to have some separation between the two long traces on the far right of the board — so swapped R6 and R8 around for ever so slightly more complicated trace but better signal separation.
Would there have been any "cross-talk"? I don't know, but seemed worthwhile to swap the those resistors just in case, for the amount of effort.
Still no jumpers, I believe without compromising the layout. I mean, I'll add jumpers when/where necessary, but ... no jumpers.


I was happy before, but this makes me happier:




Beware Holy Rollers driving Ferraris...