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sahib

Well-known member
Joined
Aug 19, 2006
Messages
3,455
Location
Glasgow - UK

DaftFader

Well-known member
Joined
May 8, 2021
Messages
63
Location
DeafStar in low geostationary orbit above the UK
Is a head-up allowed here?

These are a friends, rare a rocking horse s### Chartwell PM 450s which are effectively passive versions of the BBC designed LS5/8

 

ognam2

Well-known member
Joined
Nov 14, 2007
Messages
74
Location
Berlin
here are a few cool things for new projects to bid for on Ebay:

la2a pcb:

poor man's 660 variety mu compressor:

2x Gyraf g7 pcb set:

2x Tube Mic PSU case

international shipping possible.
 

gyraf

Well-known member
Staff member
Moderator
Joined
Jun 4, 2004
Messages
10,480
Location
Aarhus, Denmark
"This module is based on my experience in designing phase linear amplifiers for condenser microphones." - sounds slightly fishy, dosen't it?

/Jakob E.
 

dima_k85

Active member
Joined
Apr 9, 2019
Messages
27
Location
Russia
"This module is based on my experience in designing phase linear amplifiers for condenser microphones." - sounds slightly fishy, dosen't it?

/Jakob E.
What do you mean? The CM-1XP module is actually phase-linear. See the open loop "ph" graph.

1636142217694.png
 
Last edited:

gyraf

Well-known member
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Jun 4, 2004
Messages
10,480
Location
Aarhus, Denmark
..sorry, didn't realize it was your sale - only reacted because I'm slightly allergic to sales speak. And I don't see how it's more phase linear than anything else minimum-phase - or why that would matter?
 

dima_k85

Active member
Joined
Apr 9, 2019
Messages
27
Location
Russia
And I don't see how it's more phase linear than anything else minimum-phase - or why that would matter?
Jakob, microphones must be compared with the capsule assembly, since different capsules have different phase distortions. And minimizing phase distortion is important because a person perceives them much more strongly than nonlinear distortions, for example.
This is due to the fact that the human brain estimates the position of the sound source in space by assessing the phase of the signal.
It just needs to be heard once. :) One person was so impressed that he left this funny feedback:
04.png
 

BramP84

New Member
Joined
Oct 31, 2021
Messages
7
Location
Zeist, the Netherlands
I have a Triad HS-66 input transformer for sale for anyone building a DIY Pultec (ebay isn't showing the pictures yet, working on it):
 

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