Author Topic: Uber Tuber Issue  (Read 808 times)

thomasha

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Re: Uber Tuber Issue
« Reply #15 on: September 27, 2018, 01:54:02 AM »
Insert the tube pins in the main board. Heaters only, just to test if it lights up.
Test if the heaters pins have a lower resistance between them offboard.

madbean

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Re: Uber Tuber Issue
« Reply #16 on: September 27, 2018, 08:34:17 AM »
I got a new tube today but I am a little hesitant to try and desolder the daughter card and then waste a new tube. Any suggestions?

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I can send you a new daughter board. I should maybe start including two with the project. Also see my suggestions here:
http://www.madbeanpedals.com/forum/index.php?topic=28539.0
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chongmagic

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Re: Uber Tuber Issue
« Reply #17 on: September 27, 2018, 09:02:40 AM »
If you tell me how much I can just buy a new daughter board from you, I don't mind.

I did buy a second kit just in case and received it yesterday.

chongmagic

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Re: Uber Tuber Issue
« Reply #18 on: September 28, 2018, 07:14:54 AM »

I carefully unsoldered the tube from the daughter card and replaced it with a Raytheon 6111 tube. I didn't solder in the new tube but bent the leads to connect with the card. I tested again and saw that the element in the tube was lighting up. I am going to check the voltages later today to see if they are on point. I did notice that the 39R heated up as well. So hopefully the new tube has solved the issue.

Putting in a new tube with the daughter card already soldered in is not an easy task, but following the build docs and trimming the leads makes all the difference.

chongmagic

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Re: Uber Tuber Issue
« Reply #19 on: September 29, 2018, 11:32:11 AM »
With the new tube I am getting the following readings:

TP1 ----- 13.55v
TP2 ----- 11.28v
TP3 ----- 11.52v
TP4 ----- 6.58v

VC. ------ 18.08v

I am not sure why TP1 is so high but I will have to plug it in and see if it actually works now.

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chongmagic

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Re: Uber Tuber Issue
« Reply #20 on: September 29, 2018, 04:19:34 PM »
My first try with a water slide.

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chongmagic

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Re: Uber Tuber Issue
« Reply #21 on: September 29, 2018, 05:15:13 PM »
It works and sounds good.

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madbean

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Re: Uber Tuber Issue
« Reply #22 on: September 29, 2018, 05:20:10 PM »
Looks really good!

TP1 is okay at 13+v. I would worry a bit at 14v and over but I think that's fine. You could always drop it down a bit further by increasing the plate resistor to 115k or 120k.
Your heater is slightly high. Might be your PS is a little bit above 18v w/no load. As long as the heater is working and it sounds good, then GTG.
I own madbeanpedals (duh). I am part owner of Function F(X).