Recent posts

#51

Tech Help - Projects Page / Re: Harbinger One 2015 not wor...

Last post by Kardnez - October 30, 2025, 11:14:50 AM

Hello,

originally, Q2-Q13 were 2N5088 and Q1 was 2N5089. The LFO wasn't working, so I found a suggestion in older posts here on the forum to replace Q11 and Q12 with 2N3904s. This did the trick; the LFO now works. Since the input signal only goes as far as the base of Q1 and then stops, I also replaced Q1 with a 2N3904. Unfortunately, without success. I removed Q2 and tested it with a transistor tester; according to the tester, it's OK. I reinstalled it. I haven't replaced Q3 yet.

Could it be possible that several 2N5088s are faulty?

I can try replacing Q2 and Q3 with 2N3904s.

#52

Tech Help - Projects Page / Re: Harbinger One 2015 not wor...

Last post by NorthCoast - October 29, 2025, 05:48:50 PM

Hi Holger,

You mentioned you've replaced 3 transistors, what transistors did you have in there before?

Is it possible Q2 and Q3 need to be replaced?

It seems like every time you replace a transistor, there is an improvement.

#53

Open Discussion / Re: Absence, update and reflec...

Last post by flanagan0718 - October 29, 2025, 05:04:07 PM

Almost rolled my ankle running to "the gram" to follow! Your stuff is legendary to me and will support all I can. I am insanely jealous you're doing this (I simply don't have the time I used to). If you need any help or anything feel free to DM me! Congrats bud!!

-Mike-

#54

Tech Help - Projects Page / Re: Harbinger One 2015 not wor...

Last post by Kardnez - October 28, 2025, 07:47:30 PM

Hi,

here are the voltages.

Q1
C 2V
B 1,32V
E 1,28V

Q2
C 5,42V
B 2V
E 1,45V

Q3
C 12,36V
B 5,42
E 4,84V

I use a 18V power supply.

Holger

#55

General Questions / Re: Board layout for original ...

Last post by Mark0614 - October 28, 2025, 03:50:20 AM

Thank you everyone for your kind assistance, I greatly appreciated your help.

Sorry for my late replies, I'm not getting notifications for some reason.

Thanks again and happy building.

Regards

Mark

#56

General Questions / Re: Board layout for original ...

Last post by Mark0614 - October 28, 2025, 03:47:55 AM

Here's the 2012 doc. Wayback Machine FTW

Brilliant work. I never seem to use wayback, I will have to become more familiar with it.

As I suspected the part designations are the same despite the different layout.

Thanks for your assistance.

Regards

Mark

#57

Tech Help - Projects Page / Re: Harbinger One 2015 not wor...

Last post by NorthCoast - October 27, 2025, 05:29:19 PM

Can you post some pics?

What voltages are you getting on Q1?

#58

Open Discussion / Re: Check this BYOC news

Last post by jessenator - October 27, 2025, 04:50:04 PM

otherwise your mailing address and email address are on the public directory and they get harvested and abused.

preach

#59

Tech Help - Projects Page / Re: Harbinger One 2015 not wor...

Last post by Kardnez - October 27, 2025, 02:27:05 PM

Update:
I replaced Q11 and Q12 with 2N3904 transistors, and the LFO is now working. However, there is still no signal coming out of the circuit. The input signal is present at the base of Q1, but no signal is coming out of the collector/emitter. Q1 was also replaced with a 2N3904. The DC voltages in the preamplifier stage look good.
Does anyone have an idea?

Thx
Holger

#60

Open Discussion / Re: Check this BYOC news

Last post by aion - October 27, 2025, 02:26:01 PM

Is Iceland so bored they've resorted to a scam economy?    Grow your bananas, you geothermic hooligans

Apparently that site is a "buy your doing business as address here" kind of thing. Probably for tax evasion and also secrecy.
P.O. box for shell companies.

Not exactly, they just use a privacy service for the domain registration. It's an option from most domain registrars and only costs a few dollars a year on top of the domain registration. It's been the industry standard since 2010 or so because otherwise your mailing address and email address are on the public directory and they get harvested and abused.