Children will run away on seeing it:lol:
DIY :Pass F5 Turbo V2 Joshua & Ali's Documented Build
- Thread starter magma
- Start date
Children will run away on seeing it:lol:
yeh
BIg HOT spider
My 6 yrs old actually drilled two holes in the heatsink though when we were in office on sunday
keith_correa
Well-Known Member
Wow!!! For a 6 year old that's great! Congratulations to him/her :clapping:
Ali,
Your cabinet looks very good. I have feeling that you are compromising on the inside real estate. Look less to be able to comfortably fit the caps and toroid and also to be able to do the wiring with access. My impression from the picture, but may be wrong.
Cheers.
Your cabinet looks very good. I have feeling that you are compromising on the inside real estate. Look less to be able to comfortably fit the caps and toroid and also to be able to do the wiring with access. My impression from the picture, but may be wrong.
Cheers.
your impression is correct
everything is gonna be a real tight fit
it cant be helped though
ive already hit 19 inches on the width - i dont wanna go more
on the depth front ive hit 17inches
cant go further than that too
- i will have rack placement issues plus the heatsinks are 15 inches in widhth when joined
so the gap between the sinks and the front and rear plates will increase to an ugly amount ( currently its at 1 inch - sufficient for my air intake venting )
since you are here i wanted to ask
whats the diff between using a momentary switch and a SPDT toggle swtich in a power amp like this ( well this switch is in addition to the toggle with he IEC at the back )
i was thinking maybe i want a switch in the front so i dont have to take my hand over the hot amp and do the switching from the rear
Most high end power amps i have seen never have a momentary
is there a reason ?
Another question for anilva and omishra and all others who have completed the F5 build
This soft start board from theaudiocrafts : Soft Start Modules
Will these be good enough for the F5T/ver2? Magma and myself were planning to buy soft start kits from HK sellers but the Chinese New Year celebrations have derailed our plans till at least February first week. If the above will work, we might as well buy them. In INR and without customs hassles and much faster shipping from Delhi.
Something like these may work. Make sure your relay is properly rated.
Proper RC snubber may be needed to protect the relay contact from arcing damage.
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@magma, momemntory switches don't carry large current of mains supply. They just used to trigger the action in the control board. And control boards relay are actual part who make or break circuit path. This triggers works as toggle switches in soft start. On<-->off
@joshua, it's difficult to say what is content of that board and which relays. So I can t comment overs it's usage.
Edit- just saw carefully, I has pics. And it looks like same design of ebay HK sellers.
@joshua, it's difficult to say what is content of that board and which relays. So I can t comment overs it's usage.
Edit- just saw carefully, I has pics. And it looks like same design of ebay HK sellers.
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From the seller's description:
1) has four robust NTC thermistors in series with the power supply to limit initial current flow.
2) triggered by momentary switch
3) two types - cheaper one has two thermal sensors mounted on heatsink. Costlier one has four sensors. Wire to connect sensors are part of the package. 75 Deg C is the cutoff temperature that will trigger an auto power shutdown. Cannot be switched on till temperature falls below 75 Deg C.
4) Relay rated current is 30A
5) Rated power 1000 Watts
Are the above specs good enough for F5T/2 (especially the relay rating for initial current surges)? Please advise.
It would be nice to have a front panel power switch. Reaching for the rear is cumbersome. BTW, my current power amp also has a momentary switch. It has a very light-touch operation with a clear clicking sound when it toggles from one state to another, and it is mounted bang in the middle of the front panel (in fact it is the only feature on the front panel besides a surround, blue LED mood lighting).
the levinsons and the krells
we gonna need some handles on this amp man
its gonna go over 25 kgs
is this the momentary switch
its got 6 leads
i assume 2 are for the led ( thats what i was told )
how are the other 4 wired
if we use the audiocraft board i think we will need a secondary 12v supply right ?
we gonna need some handles on this amp man
its gonna go over 25 kgs
is this the momentary switch
its got 6 leads
i assume 2 are for the led ( thats what i was told )
how are the other 4 wired
if we use the audiocraft board i think we will need a secondary 12v supply right ?
this is the simple board i thought of trying
no relay
plain and simple
apparently the levinsons use something similar
Amplifier Board Sound Power Start Protection High Power Soft Start Board | eBay
the following is what om initially suggested
1x A Power Supply Time Delay Soft Start Temperature Protection Board 110V 220V | eBay
no relay
plain and simple
apparently the levinsons use something similar
Amplifier Board Sound Power Start Protection High Power Soft Start Board | eBay
the following is what om initially suggested
1x A Power Supply Time Delay Soft Start Temperature Protection Board 110V 220V | eBay
M
mpw
Guest
do momentary swithches have to use relays to control the ON / OFF.. please check this magma and jls
mpw
mpw
This has relay, and you have to use good 16A mains switch for this. There is no chance of momentory switch.
This has provision for that momentory switch which you are trying to use, also illuminated one could be used. In fact I used same in my build and provided reset switch which could be used to turn on/off the amp. This is handy while power comes back after short disruption and no one is at home. Amp won't start unless user triggers that using switch. So everything saved.
exactly
what are the advantages of one over the other ?
i was led to believe by one client that momentary switches should not be used in high current power amps
only toggles
the mark levinsons and krells were sighted
but if this is true
i was trying to understand the reason
and if its untrue then
well ... we can just go ahead and purchase the one from audiocrafts ( though i think its overpriced )
or wait for the Hong reseller to get back from chinese new year
There are fancy door handles of myriad shapes and sizes in Dadar West, just near the Kabutarkhana. May be we can try them.
is this the momentary switch
its got 6 leads
i assume 2 are for the led ( thats what i was told )
That's the momentary switch. There are various types available at audiocrafts. I prefer the blue coloured one
Two leads will be for powering the LED lighting from the soft start board. The other four must be In Live and In Neutral, Out Live and Out Neutral.
The board has AC In Live and In Neutral, AC Out Live and Out Neutral that will go to the transformer, and two (or four) leads for the temperature sensors.
I forgot to post the re-worked version of magma's layout. The depth (front to back) has been increased by 30 mm + 30 mm, so there is no enough room to wriggle in:
http://imageshack.com/a/img833/5913/trgb.png
The only subsequent change has been the decision to add a fan on the top plate and air inlet ports/holes.
Also, I did not include the copper plates that join the two sinks. So the amplifier boards will be closer to the transformer by the thickness of the copper plate.
The soft start board from Audiocrafts says it is intended to be used with a momentary switch. I like this switch.
the audiocarft board does seem like the correct one to use if we go with the momentary switch
just waiting for OM and anil to confirm this
Also im looking for their answers/inputs on my post no . 74 as well
Adding one more cost component: 1 kVA toroidal transformer, 0-230V primary, four 24-0V secondaries: Rs 5300. Delivery coming Wednesday. Home delivered. From M/S Toroidal Transformers, near Film City, Goregaon East, Mumbai. Contact: Mr Dayanand 9833429845.
FYI: They also make R-Cores. Since I have one uncompleted OPS kit without the R-Core, I have ordered one (0-230V primary, 22-0-22V secondaries, 1.36A). Cost Rs 836 plus taxes.
FYI: They also make R-Cores. Since I have one uncompleted OPS kit without the R-Core, I have ordered one (0-230V primary, 22-0-22V secondaries, 1.36A). Cost Rs 836 plus taxes.
Magma, audiocraft boards are same. The advantage of soft switch, I already mentioned in last 2-3 lines of my post#73. By default amp is 'off' when powered on though it may be power resumption after interrupted.
A beautiful, well-constructed speaker with class-leading soundstage, imaging and bass that is fast, deep, and precise.
