start up problems

NY Chief · Post by **NY Chief** » Sat Oct 01, 2005 4:18 pm

I turned my build on for the first time per Metro Instructions.
320 VAC @ pins 4 & 6 on rectifier
3.45 VAC on 2 & 7 Output
3.43 on 4,5 & 9 pre amp

but

90VAC on 2 & 8 rectifier! WTF??? I've triple checked my wiring and it looks like the manual pics.

Anybody?

Post by **VelvetGeorge** » Sat Oct 01, 2005 5:00 pm

Is this with the rectifier tube installed? If not, put it in and see what you get.

George

NY Chief · Post by **NY Chief** » Sat Oct 01, 2005 5:26 pm

No not in, George. I'll try it right now. Stand by...

NY Chief · Post by **NY Chief** » Sat Oct 01, 2005 5:35 pm

Just broke a f'n pin off the socket. Gotta change it out. arrrgghhh

NY Chief · Post by **NY Chief** » Sat Oct 01, 2005 7:23 pm

Changed out the socket, rewired to instructions, rect tube is still seeing approx 90VAC at pins 2 & 8. Also now have 350 at pin 4 but 190 at pin 6. Reflowed solder joints twice, no change.

Flames1950 · Post by **Flames1950** » Sat Oct 01, 2005 8:01 pm

With the rectifer tube in does any DC show between pin 8 and ground or only AC there too? Some amount of AC would be normal between pins 2 and 8, as pin 8 is also part of the heater for the rectifier tube; but 90VAC sounds excessive for a 5VAC tranny winding!! Wondering if you may have a defective rectifier.
Center taps hooked to ground (for the Heyboer, the green w/yellow stripe to ground, and the red w/yellow stripe to HT the fuse holder and then to ground?)

NY Chief · Post by **NY Chief** » Sat Oct 01, 2005 10:45 pm

I'll take a look Flames. Gotta get ready for a biz trip to Al Bundy's hometown!

NY Chief · Post by **NY Chief** » Thu Oct 06, 2005 11:22 am

I'm back from Chicago. Had a chance to hit Buddy Guy's Blues club. The house band was great. The open jam afterward was horrible. It's good to see that even not all native Chicagoan's are born to play the blues!

From another thread...
"No George, it's not in the kit. It be would great if you would send it. I do have a couple of small glitches though. I got a 3 .1 caps and 1 .68 rather than the 4 req'd .1's. I found an old (ewww) orange drop that I popped in just to keep going. And, I got 1 56K and 1 47K rather than 82k and 100K for the bias circuit. I'm shooting down to the shit shack right now and pick up the resistors.

Also the 2 swtiches have different size paddles. Is that intentional? "

I haven't seen anything yet, George have you shipped? Thanks!

Back to the problem...

I haven't had time to go back in yet but here are some pics...

Post by **VelvetGeorge** » Thu Oct 06, 2005 12:03 pm

I did ship the replacment parts a few days ago. I'm not sure what happened with the switch. I've never (knowingly) stocked the larger handle Carling. It must have slipped through.

George

NY Chief · Post by **NY Chief** » Thu Oct 06, 2005 1:06 pm

Thanks, George!

Guest · Post by **Guest** » Thu Oct 06, 2005 8:25 pm

VelvetGeorge wrote:I did ship the replacment parts a few days ago. I'm not sure what happened with the switch. I've never (knowingly) stocked the larger handle Carling. It must have slipped through.

George

They were in the mailbox when I got home today. Thanks, George!!

Now, back to troubleshooting...

NY Chief · Post by **NY Chief** » Fri Oct 07, 2005 12:44 am

Flames1950 wrote:With the rectifer tube in does any DC show between pin 8 and ground or only AC there too? Some amount of AC would be normal between pins 2 and 8, as pin 8 is also part of the heater for the rectifier tube; but 90VAC sounds excessive for a 5VAC tranny winding!! Wondering if you may have a defective rectifier.
Center taps hooked to ground (for the Heyboer, the green w/yellow stripe to ground, and the red w/yellow stripe to HT the fuse holder and then to ground?)

OK Flames (Dan, George, Dai, luveddie, all!) here's what I have...

Rect socket, no rect tube installed,
pins 2 & 8, 90-100 VAC, 0 DC
pins 4 & 6, 320 VAC

Output socket,
pins 2 & 7 (both) 3.45 VAC

Preamp sockets (all),
pins 4,5 & 9 3.45VAC

with rect tube in all same except I get 324 DC at rect tube pins 2 & 8

I checked wiring again. see pics.

I don't see why I'm seeing 100 VAC when it should be 5 VAC. This ain't rocket science. WTF am I missing???

Flames1950 · Post by **Flames1950** » Fri Oct 07, 2005 7:01 am

I'd start by taking the yellow 5VAC wires loose from the rectifier socket and verifying CAREFULLY that they are 5VAC. The red wire goes to the standby, so there's really nothing else in line to leak 90 volts to the rectifier socket. Does it read the same 90VAC with the standby off?

NY Chief · Post by **NY Chief** » Fri Oct 07, 2005 10:39 am

Flames1950 wrote:I'd start by taking the yellow 5VAC wires loose from the rectifier socket and verifying CAREFULLY that they are 5VAC. The red wire goes to the standby, so there's really nothing else in line to leak 90 volts to the rectifier socket. Does it read the same 90VAC with the standby off?

That's what I'm thinking, Flames. There ain't a helluva lot going on here. All readings have been with the standy switch OFF. I haven't even turned it on yet. I did a quick continuity check of the empty tube socket from the top side this morning. All open except 2 to 8. I'll pull the yellow leads off the socket and measure direct. If I get 90-100 VAC there it's gotta be the tranny, no?

I haven't installed the bias resistor yet (per the instructions) but that shouldn't make a diff, right?

Flames1950 · Post by **Flames1950** » Fri Oct 07, 2005 3:28 pm

NY Chief wrote:
Flames1950 wrote:I'd start by taking the yellow 5VAC wires loose from the rectifier socket and verifying CAREFULLY that they are 5VAC. The red wire goes to the standby, so there's really nothing else in line to leak 90 volts to the rectifier socket. Does it read the same 90VAC with the standby off?
That's what I'm thinking, Flames. There ain't a helluva lot going on here. All readings have been with the standy switch OFF. I haven't even turned it on yet. I did a quick continuity check of the empty tube socket from the top side this morning. All open except 2 to 8. I'll pull the yellow leads off the socket and measure direct. If I get 90-100 VAC there it's gotta be the tranny, no?

I haven't installed the bias resistor yet (per the instructions) but that shouldn't make a diff, right?

Yeah, is you get 90VAC from the unhooked leads there's definitely something funny about the tranny. The bias resistors shouldn't matter, you're not drawing anything through them with the standby off and no tubes in.