Koss Phase 2+2 Quadraphonic Repair Part 3

Hi

I've finished the 3rd video on my repair of the Koss Phase 2+2 Quadraphonic headphones.

The link is:

http://www.youtube.com/watch?v=VnkALj4GQt0

As I hope you can see the sock based cups look great and work a treat.

I hope you like the video, if you do please rate it and leave a comment.

WARNING:  DO NOT 'ACCIDENTALLY' PURLOIN YOUR WIFES EXPENSIVE ANTI-BLISTER WALKING SOCKS AND CUT THEM UP IN ORDER TO MAKE YOUR HEADPHONE EAR-CUPS.

I wondered why they were so comfortable ;-)

I HONESTLY HAD NO IDEA.......  please be more careful :-)

fixed1t

Koss Phase 2+2 Quadraphonic Ear Pad Sock Fix Part 2

This is the second part of my Koss Phase 2+2 Quadraphonic Headphones fix.  

Youtube Video

http://www.youtube.com/watch?v=PMxVAbxJwkU

In this fix I figured out how the get the true shape of the original ear pads using diagrams from the Koss original Patent Application.  I then decided to make a plastic template of the pad shape to work with and select an old white plastic CD box.

I glued the paper to the plastic panel I'd cut out then cut out the shape with a fret saw.

I then checked the shape against the Koss Phase 2+2 right headphone.

Once I knew it fitted I cut the bottom off and old military sock and began folding

The result was something that resembled the original pad and worked thanks the the rigid plastic maintaining the large exit hole.

And here is the partner sock still untouched.

And this is the left side view of the headphones.

More work to be done, but the patent picture provided the only true picture of the shape of the phones.

Cheers fixed1t

Koss Phase 2+2 Quadraphonic Controller Headphones Repair Part 1

Hi,

In the 70's the dream system for the music heads 'geeks of the time' was Quadraphonic.  Unfortunately it didn't catch on that well, well not for 20 years, partially because the system diagrams at the time showed huge rooms with 4 speakers strategically placed in each corner and most UK houses had no such thing.

The was a HiFi shop in Aldershot not far from my Dental Corps barracks that was heavily into Quad so I bought a Ferguson Quadraphonic Amp, 4 huge JVC speakers, a JVC CD-4 decoder and I was hooked.

Of course in the billet there was little room to set the system up without the agreement of the guy in the opposite bed.  I loved the system and the sound was amazing.

But on a trip to Guildford I came across a shop selling the

Koss Phase 2+2 Quadraphonic Headphones 

with Ambience Expanders, Binauralators, Quad Field and Quad Comparator

For weeks I used to go there and try them on and try different combinations of the programmer settings.  But I couldn't afford them and them and then I moved away.


Ever since I first discovered eBay I've been looking for a pair with absolutely no luck and then suddenly I came across 2 pairs in quick succession, alas both in an awful state of repair.  But being fixed1t I couldn't resist giving it a go.

So I set about repairing one to see if it was possible.

The link below is to my youtube video of the repair of the controller box.

http://www.youtube.com/watch?v=lKgqzJYzEWI&list=UUa7OD3xhZ0Xbb2aUSuIQujw

I will be doing another video to show on how I solved the issue of replacing the bizarre and huge headphone pads.

The Music is an Ambient composition called "Raindrops" by fixed1t

If you like the video, check out my other blogs and videos on fixed1t youtube.

Cheers fixed1t

DOEPFER MAQ16/3 Analogue Switch Modification by fixed1t

Hi I've been doing a number of useful modification and repairs to gear for years and have pasted a number of youtube videos, but I'm only now moving into blogging.  I plan to add the youtube items to my blog then move on from there with some new fixes and mods via this blog.


As many will be aware switching a lot of electrical items at once creates a huge spike in the electrics that can end up crackling your amp and frying some of the more sensitive items.  I therefore try to avoid switching lots of things on at once and turn them on sequentially.  Of course this works for mains powered equipment as they usually have an on/off switch at the front.  But not so for many Wall-wart DC input gear where they are switched on at the transformer brick.

Unless you have individually switched plug boards on the top of your units (very doubtful) then they are at the back of things on the floor and are therefore left one and switched off a the mains plugged.  So switch on gives the system a surge it could do without.  This is a mod I did a few years back.

DOEPFER MAQ16/3 Analogue Switch Modification

I purchased a Black Doepfer MAQ 16/3 analogue sequencer with CV voltage, gate and midi in and out some years back and became really irritated that it didn't have an on off switch on the front, but it had the usual cheap and difficult to plug and unplug 9v DC wallwart socket on the back.

When I could take the hassle no longer and decided to put a power switch on the front and selected one which looks (from the picture below) like it should always have been there.  The Mod took an hour or so to do (safely) but works a treat.  I decided to video it from my Windows pc phone, (thats all iI had back then) so sorry for the poor quality video.

 

I placed the video on youtube.

http://www.youtube.com/watch?v=n81SN6kBkZg

The Soundtrack is my own:

Angels vs Robots 

I wrote it with the MAQ after making the mod in celebration.

I hope people find it useful, please rate the mod and most of all let me know if you do it.

Cheers fixed

Just added my

Garageband Mac to iPad Oneshot File Converter 

Applescript Application to my music fixed1t software blog at:

fixed1t music software 

http://fixed1t-music-software.blogspot.co.uk/

I hope Garageband users will find it useful, I certainly do.

Cheers fixed1t