Category Archives: Balancing

Making a QTP patching system using DB25 patchbays

Audio over CAT5, Balancing, CAT6-Audio Transfer, Connections, DB25, IDentification Area, Interface, Label Area, Presentation, QTP, QTP to DB25, Quad Twisted Pair, Rhumor, T-568A, Testing

Dual row, 24 Channel by 24 Channel
DB25 to DB25 patchbay wiring price:
(12)  QTP-DB25M              $12.04    = $144.48
(24) CAT6-10-Green         $7.80      =  $187.20
6 cable  price: $331.58   

Checking the spacing fit for QTP-DB25M adapters.

IMG_6285 IMG_6291 IMG_6294 IMG_6299 IMG_6301 IMG_6303 IMG_6307 IMG_6319Not a single problem detected.  With all signals balanced and power on two different phases, no measurable induced noise detected.

Ask us about Bit-Tree patchbays

April Fools are paying 4 times the price.

Audio, Audio over CAT5, Balancing, CAT6-Audio Transfer, Connections, DB25, NAB, Pinout, QTP, QTP to DB25, QTP to XLR, Quad Twisted Pair, Rhumor, RJ45, TRADESHOW, WBS, XLR

QTP – DB25

QTP-DB25M               Male
QTP-DB25M - Face 3:4
QTP-DB25M+             Male + Shield
QTP-DB25F                 Female
QTP-DB25F - Face 3:4
QTP-DB25Y                 Yamaha Male
QTP-WBS                    WBS-High Density Breakout  – TBA NAB-2015

QTP – BREAK OUT BOX

phpThumb_generated_thumbnailjpg-4
QTP-BOB-XLR-F           Female

phpThumb_generated_thumbnailjpg-2
QTP-BOB-XLR-M         Male
QTP-BOB-XLR-FM       Female / Male

phpThumb_generated_thumbnailjpg
QTP-BOB-XLR-MF       Male / Female
QTP-BOB-BNC             AES / SPDIF
QTP-BOB-BNC10         AES / SPDIF w/ 10dB pad

QTP – TAILS

QTP-XX-*-XLR-F           Female
QTP-XX-*-XLR-M         Male4-1QTP-5-2-M 

QTP-XX-*-XLR-FM       Female / Male
QTP-XX-*-XLR-MF       Male / Female

2-2QTP-XX-*-PHNX           PHOENIX

3-1QTP-XX-*-TRS              Tip Ring Sleeve

1-1
QTP-XX-* -U                 User-terminated
XX = Cable Length (ft)   3, 5, 15, 30
*  = Tail Length (ft) 1, 2, 3, 4

QTP – Kits

10411
QTP-CAT6-KEY              Keystone Termination
QTP-HSK-1                    1’ Heat Shrink Kit
QTP-HSK-2                    2’ Heat Shrink Kit

QTP – PANEL

QPNL-3-DB25               2RU ¼ Panel
QPNL-4-DB25               2RU ¼ Panel




QTP AES 110Ω to 75Ω SPDIF BNC over Quad Twisted Pair!

AES, Audio, Balancing, Connections, Interface, Quad Twisted Pair, Testing, WBS, XLR

 

 

Some more Quad Twisted Pair results are in using custom wound transformers found in the renown Ward-Beck Systems  IMP series.

We’re finding an insignificant Jitter of less that 200 pico seconds across the spectrum at a clock speed of 192Khz, making QTP perfect for the transmission of digital AES signals up to 192Khz.  More to come!   Screenshot 2015-03-16 17.23.46
 Screenshot 2015-03-16 17.36.04

Tristan Miller vs 1000 feet of Quad Twisted Pair

Audio, Balancing, Pinout, QTP, Quad Twisted Pair, Testing, WBS

We were lucky enough to have Tristan Miller of Catherine North Audio over for the day to give Quad Twisted Pair an examination.  Tristan is an Electronics Technician with a comprehensive background in Electrical systems being a licensed Electrician.  Having implemented over a thousand channels of QuadTwisted Pair in his recording studio(s), he has been a great influence of the ideas surrounding implementation and execution.   His understanding of Electrical and audio systems is like no other.   He came armed with a brand new 1000 foot box of CAT5e Quad Twisted Pair cable to play with.  Along with repeating our original tests, some new tests were conducted to compliment our original findings.

We let Tristan drive the Audio Precision 2700 so all  tests results were independently confirmed:
2015-03-05 15.37.41 Continue reading Tristan Miller vs 1000 feet of Quad Twisted Pair →