new build 36lite with vvr

[chaliapin]

Great thanks. If I go for new heater wire from tube town what's the best option? 20awg? Solid or stranded? Cloth covered?

[JMPGuitars]

Great thanks. If I go for new heater wire from tube town what's the best option? 20awg? Solid or stranded? Cloth covered?

I use 20AWG PTFE wire. 22AWG is sufficient enough for Marshall to use it in their amps tho.

Don't use cloth covered wire in your amps unless you're looking for the wrong kind of .

Thanks,
Josh

[Bieworm]

Tube-Town sells 0.7mm silicon wires. I always use those.

[chaliapin]

Great, thanks guys. Gonna order vvr kit from tubetown and sockets and probably heater wire. Anything else I might need after ive broken something? Any Zeners to fix high voltage? I should have everything for 36w lite then, plus parts for effects loop, vvr and type 2 MV.

I've no funds left for reverb parts at this point but i listened to your recordings on the tele forum bieworm and i really liked it. Any links to docs etc would be v appreciated.

[JMPGuitars]

You can find general useful info and Zener info here: viewtopic.php?t=25173

Or you can click the B+ dropping thread link in my signature.

Thanks,
Josh

[Bieworm]

Great, thanks guys. Gonna order vvr kit from tubetown and sockets and probably heater wire. Anything else I might need after ive broken something? Any Zeners to fix high voltage? I should have everything for 36w lite then, plus parts for effects loop, vvr and type 2 MV.

I've no funds left for reverb parts at this point but i listened to your recordings on the tele forum bieworm and i really liked it. Any links to docs etc would be v appreciated.

I built it from scrap parts. Will post the docs when I tur. on my laptop

20220517_185519.jpg

20220517_194411.jpg

[chaliapin]

Thanks. Your scrap looks a lot more useful than mine...

[Bieworm]

Lol.. the chassis is an industrial guiding rail for electrical wires that was left over from one of my construction sites. The power transformer is a 2A 12VAC-240VAC that costed 10€ or so..turretboard leftovers...

[chaliapin]

So ive soldered TWO components onto my turrets. Watched the videos. Everything seems much smaller and fiddlier in real life...

Question time as usual. For the connector runs (is it a 'ground bus' ?) When do use bare wire and where normal sheathed wire.

Secondly, you see the unsoldered bare wire, should be connecting 6 turrets. Do you use one piece and take a turn round each as you go or cut separate pieces to go between every turret to be connected?

Thanks in advance for your, as yet, untiring help and advice...

[chaliapin]

Close up of first turret. Err, and another q. So that turret has c2 and r5 connected already but needs leads to v1 pins 3 and 8. Do you get all four bits physically connected and then solder in one?

[chaliapin]

Soldered the two wires on. Looking at the layout I adapted I noticed it never has four connections to one turret, max three. It looks not great as you can see. Guess I'll be un soldering and adding an extra turret. Luckily there's room.

[JMPGuitars]

You have excessive solder on there, careful not to do that.

Your main ground bus wires at the top of the board don't need tubing on them. If you have any wires going through other parts of the board, then insulate those.

There are lots of photos here for reference in other threads and the galleries to give some insight. Here's one of my builds:



Thanks,
Josh

[Bieworm]

Here are my docs:

Poseidon Reverb schematic rev.pdf

layout execution poseidon in rail chassis.png

20221022_224034.jpg

20221022_224058.jpg

20221022_224040.jpg

[chaliapin]

So my bits and pieces finally arrived (still no replacement sockets but ive plenty to be getting on with) I got 500k dual gang audio pot for the MV/ drive control but it's mini! See pic, can I use it or did I order the wrong thing?

[chaliapin]

Ongoing turret board work.

[chaliapin]

Couple of Qs regarding the centre tap. I have the solder strip, planning on drilling it out a little so it sits on one of the PT mounting bolts as in picture.

Im also planning on connecting the screen to the tag strip. On one schematic it shows a fuse marked HT 500mA. On my other layout and schematic using that exact transformer there is no fuse. Shall I proceed without?

[Daviedawg]

You should have (at least) two fuses in any build, the incoming mains power fuse and the HT fuse protecting the power distribution circuit after the PT. Some circuits have it before the rectifier and some after.

Dd
Edit: to be clear you need a fuse after the power transformer but it can equally well be before or after the rectifier. The value in ma to be based on the current at that point.

[chaliapin]

Great thanks, so a half amp fuse for the screen wire running from the pt. Should the centre tap connection go through that fuse as well or centre tap directly to ground?

Is it another slow blow fuse?

[Daviedawg]

In the situation you are asking about the fuse needs to go after the rectifier on the B+. Slo blo.

Dd

[Daviedawg]

After a quick look at the schematic I believe you are using, I would put it after the standby and before the drain (220k) resistor. That way the caps will drain if it blows.

Dd