Recent Posts

41

BeePre / Re: Resistance Check at 26

« Last post by Paul Birkeland on April 21, 2024, 05:41:09 AM »

There are black wires going to and leaving terminal 26 that help tie it to the audio ground.  If you don't see the appropriate reading there, one of those wires is missing or not well soldered.  Definitely you will want to fix this before turning on your amp.  Posting a build photo if you can't see what's wrong is also a great idea.

42

Moreplay / Hum in the input-chanel with phono preamp, left chanel cracks (Solved!!)

« Last post by [email protected] on April 21, 2024, 04:37:53 AM »

Hi Everybody!

Many Thanks to everybody and especially to those who helped me figuring out the problems!!! It is solved and you where again
absolutely right, I soldered the black cable to the tubesocket for some reasons??? I changed it and now there is no hum at all and it sounds
absolutely devine!

Thank to everybody!
Great Forum!

Jens

43

Kaiju Stereo 300B amp / Re: driver testing

« Last post by joralieu on April 20, 2024, 07:05:24 PM »

Also had the JC29  backwards, had desolder and resolder them. Wonder if I may have damaged something in the process

44

Kaiju Stereo 300B amp / Re: driver testing

« Last post by joralieu on April 20, 2024, 03:06:25 PM »

Another thought, I had my LM431A's in backwards. I desolderd them and turned them. Could that be the problem?

45

BeePre / Resistance Check at 26

« Last post by hpleung on April 20, 2024, 11:46:22 AM »

Hi I have posted my resistance check list below.

There is a major mismatch at 26. It is showing me a fluctuating resistance between 70 to 100+ kohm. It really should be 0.

The other one that is suspicious is at 21; it is giving me 0.6 ohm when it is expected to be 0.

I have not attached a picture yet as I don't even know where to take the picture.

Are there any guidance on where i should look or what pictures I can attached?


   Observed
1   4.5
2   390kohm
3   0.3
4   5.6
5   0.3
6   145 kohm
7   470.5kohm
8   0.3
9   0.3
10   1.8mega ohm
11   145kohm
12   468kohm
13   0.3
14   0.3
15   12 mega ohm
16   4.3
17   388kohm
18   0.3
19   5
20   0.3
21   0.6
22   15 mega ohm
23   0.3
24   0.3
25   2.7 mega ohm
26   Fluctuating 70-100 kohm
27   0.4
28   0.3

46

Pipette Speaker / Re: Pipette Side Baffle

« Last post by benzxc on April 20, 2024, 11:26:21 AM »

Thanks so much Matt! New sides should not be necessary. Doesn't seem too hard to glue them in! Thanks again!

47

Pipette Speaker / Re: Pipette Side Baffle

« Last post by mjabloner on April 20, 2024, 06:38:15 AM »

Thanks Ben, That was my mistake. I should have glued them in. So sorry.
My email is [email protected]. I would appreciate a pic.

Yes, wood glue will take care of it. Dry fit the brackets. They are friction fit by design. If too tight use a block plane or 150 grit sandpaper on the bracket so they fit without too much pressure. Orient the bracket so the threaded insert flange is on the front side of the side - away from the rebate/rabbit. Apply wood glue and tap down the bracket to make good contact. Check that the bracket is perpendicular to the side. Tap to adjust if necessary. Clamping is not necessary.

Or if this is too much of a hassle I will send you a new pair of sides on Tuesday.

Thank and sorry again,
Matt

48

Kaiju Stereo 300B amp / Re: driver testing

« Last post by Paul Birkeland on April 20, 2024, 05:41:14 AM »

It would likely be best to remove one of the boards, flip it over, and show a picture of the bottom as well.

49

Pipette Speaker / Re: Pipette Side Baffle

« Last post by benzxc on April 20, 2024, 05:17:48 AM »

And I'm referring to the wavy brackets inside the sides.

50

Pipette Speaker / Re: Pipette Side Baffle

« Last post by benzxc on April 20, 2024, 05:16:47 AM »

Hi Matt, I am having difficulty uploading photos. Do you have an email that I can reach you at?