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Junior Varsity
X32 Discussion
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<blockquote data-quote="Timo Ulkuniemi" data-source="post: 83671" data-attributes="member: 1978"><p>CAT+power-cable test results</p><p></p><p>Hello</p><p></p><p>I set X32 as described earlier.</p><p></p><p>Inputs are two S16 with all channel gains at minimum and nothing connected.</p><p>All channel routed to LR - pan set in middle - all dynamics and EQ set OFF</p><p>All input faders and master set to maximum / +10 - all AUX- & EFF-RET-channels MUTED</p><p></p><p>CAT5-cable shielded, but shield NOT connected at either end due to lack of connectors with shield. I plan to connect it in PSU-end someday. Cable lenght 20 meters / 65 feet</p><p></p><p>Output from 15 & 16 connected into Carver PM300 ( dual 150W @ 4ohm ) - fully cranked up - ReVox Magic Qubes - slight hiss noticeable - master fader kills it when pulled down.</p><p></p><p>iPhone 4 with RTA-lite as "precision" measurement instrument mounted about 25mm/1inch in front of coaxial speaker centre as in picture #3 :lol:</p><p></p><p>With nothing connected to amp - 40dB @ 800Hz and 35dB @ 12,5KHz</p><p>With master fader DOWN - 40dB @ 800Hz and 50dB @ 12,5KHz</p><p>With Master fader UP - 50dB @ 800Hz and 68dB @ 12,5KHz</p><p></p><p>Having a 1KW load ( a heater ) connected via thyristor dimmer into wrapped power cable, while everything is full coiled on cable drum has NO EFFECT what so ever on measurement - neither there is nothing to be heard besides the basic hiss. Trying to set the dimmer at different levels does NOT make ANY difference. Dimmer was on one end of cable and load was at the other.</p><p></p><p>Next we set up the<strong> REALLY DANGEROUS</strong> system. We took the dimmer away and introduced a "SWITCH" at load end of cable. Switch consists of rough file touched with sharpish object as seen in picture #1 - <span style="color: #ff0000"><strong>DO NOT TRY THIS UNLESS YOU DO KNOW WHAT YOU ARE DOING !!! </strong></span> There is 240V live with 16A fuse present in <strong>ALL VISIBLE PARTS</strong> !!!</p><p></p><p>Load was again the 1000W heater - as it is old and I do not really start whining, if it dies in behalf of science....:roll:</p><p></p><p>My friend was behind the door risking his life with my contraption and produced nice sparks, as can be seen in picture #2</p><p></p><p>I was safely next door listening and observing iPhone RTA - there was first about 2dB hopping, but when I closed the door, there was NOTHING different!</p><p></p><p>By now we had spent about two hours with preparing etc and we started to have an urge of <strong>C[SUB]n[/SUB]H[SUB]2n+1[/SUB]OH</strong>. and decided to study it later, if necessary. We both feel, that coiled on metal reel is worse, than laying free on floor ( we do NOT KNOW for sure ) but if someone can provide good reason to repeat test with more or less straight cable, I just might do it :roll:</p><p></p><p></p><p>Finally there is picture #4 showing the test setup:</p><p>- power feed into everything low right corner</p><p>- X32 and 2xS16 + cable drum ( I just had it laying around and decided to use it ( beefed up with old speaker grill to hold cable ends whilst in transit )</p><p>- dimmer can be seen on top of blue Anvil Case under X32</p><p>- extension cable is used to have the load next door.</p><p></p><p></p><p></p><p>[ATTACH]152142[/ATTACH][ATTACH]152143[/ATTACH][ATTACH]152144[/ATTACH][ATTACH]152141[/ATTACH]</p></blockquote><p></p>
[QUOTE="Timo Ulkuniemi, post: 83671, member: 1978"] CAT+power-cable test results Hello I set X32 as described earlier. Inputs are two S16 with all channel gains at minimum and nothing connected. All channel routed to LR - pan set in middle - all dynamics and EQ set OFF All input faders and master set to maximum / +10 - all AUX- & EFF-RET-channels MUTED CAT5-cable shielded, but shield NOT connected at either end due to lack of connectors with shield. I plan to connect it in PSU-end someday. Cable lenght 20 meters / 65 feet Output from 15 & 16 connected into Carver PM300 ( dual 150W @ 4ohm ) - fully cranked up - ReVox Magic Qubes - slight hiss noticeable - master fader kills it when pulled down. iPhone 4 with RTA-lite as "precision" measurement instrument mounted about 25mm/1inch in front of coaxial speaker centre as in picture #3 :lol: With nothing connected to amp - 40dB @ 800Hz and 35dB @ 12,5KHz With master fader DOWN - 40dB @ 800Hz and 50dB @ 12,5KHz With Master fader UP - 50dB @ 800Hz and 68dB @ 12,5KHz Having a 1KW load ( a heater ) connected via thyristor dimmer into wrapped power cable, while everything is full coiled on cable drum has NO EFFECT what so ever on measurement - neither there is nothing to be heard besides the basic hiss. Trying to set the dimmer at different levels does NOT make ANY difference. Dimmer was on one end of cable and load was at the other. Next we set up the[B] REALLY DANGEROUS[/B] system. We took the dimmer away and introduced a "SWITCH" at load end of cable. Switch consists of rough file touched with sharpish object as seen in picture #1 - [COLOR=#ff0000][B]DO NOT TRY THIS UNLESS YOU DO KNOW WHAT YOU ARE DOING !!! [/B][/COLOR] There is 240V live with 16A fuse present in [B]ALL VISIBLE PARTS[/B] !!! Load was again the 1000W heater - as it is old and I do not really start whining, if it dies in behalf of science....:roll: My friend was behind the door risking his life with my contraption and produced nice sparks, as can be seen in picture #2 I was safely next door listening and observing iPhone RTA - there was first about 2dB hopping, but when I closed the door, there was NOTHING different! By now we had spent about two hours with preparing etc and we started to have an urge of [B]C[SUB]n[/SUB]H[SUB]2n+1[/SUB]OH[/B]. and decided to study it later, if necessary. We both feel, that coiled on metal reel is worse, than laying free on floor ( we do NOT KNOW for sure ) but if someone can provide good reason to repeat test with more or less straight cable, I just might do it :roll: Finally there is picture #4 showing the test setup: - power feed into everything low right corner - X32 and 2xS16 + cable drum ( I just had it laying around and decided to use it ( beefed up with old speaker grill to hold cable ends whilst in transit ) - dimmer can be seen on top of blue Anvil Case under X32 - extension cable is used to have the load next door. [ATTACH=CONFIG]152142.vB5-legacyid=6345[/ATTACH][ATTACH=CONFIG]152143.vB5-legacyid=6346[/ATTACH][ATTACH=CONFIG]152144.vB5-legacyid=6347[/ATTACH][ATTACH=CONFIG]152141.vB5-legacyid=6344[/ATTACH] [/QUOTE]
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