Search found 474 matches
- Wed May 15, 2024 6:40 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 70
- Views: 1967
Re: The Much Anticipated (?) Bluesmaster Build Thread
Been playing “Operation” with the main board for the last couple hours and I’m getting close to being at the next test point. I was hoping to get some feedback on the PI lead dress if possible before I nail it. Took a gander at the Livesey site and the documented Bluesmaster builds here - most notab...
- Wed May 15, 2024 2:30 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 70
- Views: 1967
Re: The Much Anticipated (?) Bluesmaster Build Thread
Always worth it Martin; and appreciatedmartin manning wrote: ↑Wed May 15, 2024 2:16 pm Yea, sorry for the diversion. If you went ahead and wired the rest of it up you'd have been fine. Hopefully the learning was worth the trip!
- Wed May 15, 2024 2:13 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 70
- Views: 1967
- Wed May 15, 2024 2:12 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 70
- Views: 1967
Re: The Much Anticipated (?) Bluesmaster Build Thread
I’ll have to look and see. If so - shame on me for forgetting that lesson. I can still remember the serial number of every weapon that was ever assigned to me (going back ~30 years now), but I can’t remember what I ate for dinner 3 days ago. Age, TBIs, too much Laphroaig, all of the above? :lol: Onw...
- Wed May 15, 2024 2:00 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 70
- Views: 1967
Re: The Much Anticipated (?) Bluesmaster Build Thread
Do you have heater leads connected between the two sockets? If not that would explain it. I thought I saw a back/white twisted pair. I added the twisted pair late last night to perform sluckey’s test; but they weren’t soldered in to V4. I was measuring from the loose leads. I took them out a little...
- Wed May 15, 2024 1:51 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 70
- Views: 1967
Re: The Much Anticipated (?) Bluesmaster Build Thread
I’ve actually got that resistor on pin 2 of V4. Should I move it or connect the heater bridge and see if the voltage balances out?martin manning wrote: ↑Wed May 15, 2024 1:45 pm That says that the 150R from 2 isn't connected to ground.
- Wed May 15, 2024 1:49 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 70
- Views: 1967
Re: The Much Anticipated (?) Bluesmaster Build Thread
Measuring across the two heater leads coming out of the transformer with the bulb limiter in place gives me 6.4vac.
- Wed May 15, 2024 1:42 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 70
- Views: 1967
Re: The Much Anticipated (?) Bluesmaster Build Thread
Understood.
I get 150 from 7 to ground, but open from 2 to ground. When the heater leads were attached, I was getting 150 on either/both sides. Here’s a close up of the socket:
I get 150 from 7 to ground, but open from 2 to ground. When the heater leads were attached, I was getting 150 on either/both sides. Here’s a close up of the socket:
- Wed May 15, 2024 1:19 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 70
- Views: 1967
Re: The Much Anticipated (?) Bluesmaster Build Thread
I’ve got the ACT, bias pot resistor, and ground wire from the bias supply board all sharing the same ground lug. Pin 7 has the 150R ACT, the blue wire to the resistor side of the LED terminal strip, and a green heater wire. If I detach the heater leads and measure across them, aren’t I essentially r...
- Wed May 15, 2024 12:10 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 70
- Views: 1967
Re: The Much Anticipated (?) Bluesmaster Build Thread
I’ll go over everything one more time, but I’m fairly certain that I don’t. Is it safe to measure heater voltage with the leads off the socket and just hanging in the air? The only other thing I wonder about is the terminal strip where the LED connects. Could the phenolic part have absorbed flux and...
- Wed May 15, 2024 3:05 am
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 70
- Views: 1967
Re: The Much Anticipated (?) Bluesmaster Build Thread
One thing I noticed was having the diode and resistor for the lamp going to the wrong pins - so I fixed that. Measuring as sluckey advises gets me 6.4vac and has always been right around that. It’s when I measure each pin to ground that I get the stated discrepancy. If measuring that way isn’t relia...
- Wed May 15, 2024 1:53 am
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 70
- Views: 1967
Re: The Much Anticipated (?) Bluesmaster Build Thread
Understood and thank you for the advice
Currently retracing everything and will report back.
Currently retracing everything and will report back.
- Tue May 14, 2024 11:43 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 70
- Views: 1967
Re: The Much Anticipated (?) Bluesmaster Build Thread
Ok, replaced the heater ACTs with 150R and fired it up. Now I have 6.2vac on pin 2 and 0 on pin 7.
Could the PT wires have been incorrectly marked? The clipped/wrapped heater CT has the white stripe on it and the two I’ve got going to V5 are solid green.
What else could it be?
Could the PT wires have been incorrectly marked? The clipped/wrapped heater CT has the white stripe on it and the two I’ve got going to V5 are solid green.
What else could it be?
- Tue May 14, 2024 8:45 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 70
- Views: 1967
Re: The Much Anticipated (?) Bluesmaster Build Thread
Ugh! It appears that I do indeed. I guess that would explain it. I suppose it wouldn’t be one of my builds without a stupid mistake like this, lol. Hopefully I can limit it to just this one… I have a Mouser bag sitting here with 2 Koa 150R resistors in it that for the life of me I couldn’t remember ...
- Tue May 14, 2024 7:51 pm
- Forum: Dumble Discussion
- Topic: The Much Anticipated (?) Bluesmaster Build Thread
- Replies: 70
- Views: 1967
Re: The Much Anticipated (?) Bluesmaster Build Thread
“ Don't understand this... If pin 2 to pin 7 is 6.2, I would think pins 2 and 7 should both be ~3.1 to ground. Is the only load you have on the heater circuit the panel lamp? What kind of panel lamp is it?” I thought that was odd… The panel LED strip is wired per the layout with the 1n4003 and a 511...