Recent Posts

1

Moreplay / Re: Transformer Secondary Test bad voltage readings

« Last post by Paul Birkeland on Today at 11:10:34 AM »

Can you post some photos of what you have wired up at the moment?  Did you switch the power switch on at the front of the chassis plate?

2

Moreplay / Transformer Secondary Test bad voltage readings

« Last post by jonathon_parry on Today at 10:26:10 AM »

I'll appreciate some help troubleshooting this issue.  Using the voltage test procedures on page 29 of the Moreplay manual, I am seeing just 0.002 to 0.003 volts AC at terminals 6 and 7 and 0.010 volts for terminals 9 and 10.  Obviously not even remotely close to the required ranges of 8 to 10 volts AC for terminals 6 and 7 and 110 to 130 volts for terminals 9 and 10.  Meter is set to show volts and not millivolts.  My household line voltage tested at 120.9 VAC and I followed the transformer wiring instructions for mains voltage of 110 to 130 VAC on page 27.

I have double checked all the wiring and solder joints instructions up to that point in the manual, and it appears I've wired the transformer as instructed to the right terminals and all solder joints appear solid.  The only slight problem up to this point was minimal melting of the black wire power switch lead, but it passed the resistance test and appears to be functioning normally.  Kit was purchased 2 to 3 months ago.

Ideas?  Thanks very much - Jon in SLC

3

Music / Popa Chubby

« Last post by Natural Sound on Today at 09:00:41 AM »

I stumbled across this guy on satellite radio while on some errands today.

4

Crack / Re: Speedball upgrade fail after a month, voltages way off

« Last post by Paul Birkeland on Yesterday at 11:58:48 AM »

What are the DC voltages on each side of each 270 ohm resistor in the power supply?

5

Crack / Re: Speedball upgrade fail after a month, voltages way off

« Last post by goldencalves on Yesterday at 11:30:58 AM »

OK, so:

1) Unit went through dishwasher
2) isopropyl/toothbrush scrub of most reachable solder joints
3) replaced cracked 270 ohm resistor b/w U15 and U21

Large speedball readings basically the same:
OA : 0
OB : 44.5
G : 3.0
B+ : 50

And the 2 LEDs on the large board in front of Q2A are out (rest of LEDs are working).

Anything else I can do? Would it be worth it to do a full resistance/voltage check?
Should I replace the other 270 ohm resistor as well (does not appear damaged from the exterior)?

Thanks,
Chris

6

S.E.X. Kit / Re: Lost nylon acorn nut

« Last post by Paul Birkeland on Yesterday at 09:35:47 AM »

If there's no continuity between the chassis and that insulated terminal, you should be OK temporarily. 

7

S.E.X. Kit / Re: Lost nylon acorn nut

« Last post by Clover on Yesterday at 09:05:24 AM »

Yup, ordered online.  Not going to be here for 5 days.  Not the end of the world, just kicking myself for losing it.  One quick ham fisted moment and I have now spent hours looking for it at my house and various hardware stores.  Kind of silly but I had a goal of completing it this weekend.  I figured that would give me time to enjoy it for a bit and see if I wanted to go for the BeePre2 while it is on sale before the end of the month.  I think I am going to continue to build around that and will just replace that nut once it gets here at the end of next week.  I'm guessing I should wait to power it up and do voltage checks and what not until I have the right nylon acorn nut.

8

S.E.X. Kit / Re: Lost nylon acorn nut

« Last post by debk on Yesterday at 08:52:57 AM »

You can always order them from McMaster-Carr

9

S.E.X. Kit / Re: Optimizing output transformer for high impedance headphones

« Last post by Natural Sound on Yesterday at 08:18:49 AM »

That makes sense. Thanks Paul.

10

S.E.X. Kit / Re: Lost nylon acorn nut

« Last post by Paul Birkeland on Yesterday at 08:16:36 AM »

A 4-40 nylon nut off Amazon is OK.  A specialty fastener store ought to carry these as well.