Potential Other Group Buys related to EUVLs F5X

[CeeVee]

Hi Heinz,

Toroidy are very friendly and quick to respond, i can email them if you like for a quote, i don't have mine yet...still finishing another build

[heinz1]

Thanks, CeeVee, for your help!

Now we have to decide whether we ask for 500VA or 600VA transformers.

A few remarks by EUVL on that issue in response to might help.

It would be also good to know whether the individual buyer would have a choice between enameled and flexible leads.

[heinz1]

Amended list:

SumR (Canada)
(part number: RC0600 915 5; see post #179 and confirmed in post #181)

qusp

Toroidy (Europe)

samoloko, mravinsky, heinz1, CeeVee

Antek (USA)

alazira

to be seen whether there is enough interest

[qusp]

Originally Posted by alazira

Antek does not have a shielded 500VA 2x15V, but their non-shielded 500VA 4x15 one is within the size parameters. If there is sufficient interest, perhaps they can be persuaded to add an "AS-5215" to their product offerings. Price would likely be about $60/Tx and $11 shipping for two transformers.

i actually just asked them about this exact thing the other day, thats a good idea, i would suggest the 600va though. thats for test builds, as i have a number of power amps on the bench and they will end up either powering the aleph jx, or staying as resident test iron. i'm also looking into large 450va Rcores from japan $$$$

[qusp]

Originally Posted by heinz1

Thanks very much, qusp, for your thoughts, reflections and your offer to help presumably in several aspects. Let's summarize. Other parts suitable for group buys are:

- mounting bolts
- switches
- hookup wire (I will send you a PM concerning this)
- (PRP) resistors

i'll shoot you a reply in the morning about the wire, only that and perhaps the bolts etc i would perhaps help out with. we would need to reach 100m of the wire for me to reach my minimum order, but thats not a lot of power wiring, output wiring and a few people wanting speaker cables. they only do solid core though, which is great for me and is my favorite larger gauge wire.

the prp i can put someone in touch with the rep there, they will deal with anyone, so its not a problem.

i would participate in the switch gb, but not organize it, which i think is a really good one, but a problem might be deciding on a style that everyone is happy with. they are (Apem) imo a much nicer switch than the standard Bulgins that you see everywhere and they have a large range, i prefer discrete leds and a really nice brushed metal push-button to the led ring push buttons that have become kinda passe imo. i think buerklin have them, but depending on numbers we might be able to contact them directly. ive found with my business that most companies will do such a thing, as long as its not insultingly small order

Prices from this vendor for the SK 88-100: 1-9 € 10,00/piece; 10-49: €8,51/piece; 50-99: €7,50/piece; 100 and up: €6,72 (19% VAT included)

This heatsink is also available as 1000mm (1m) variant.

Price for one sink: €57,00 (19% VAT included). Cutting this sink into 8 pieces of 125mm length would yield heatsinks of correct length costing €7,12 each.

nice idea with getting it in 1m, you could probably convince them to go larger if its possible to ship larger practically, i'll be sticking to conrad for everything though, since they are local (as local as one can be on the other side of the island)

and i really think you guys would do well to team up to get crydom SSR power relays for the protection cct, though i have enough of them and magnatech to last me for years, but its the sort of item you tend to get very good reductions on.

[samoloko]

Originally Posted by heinz1

Thanks, CeeVee, for your help!

Now we have to decide whether we ask for 500VA or 600VA transformers.

A few remarks by EUVL on that issue in response to might help.

It would be also good to know whether the individual buyer would have a choice between enameled and flexible leads.

I think that 500VA Is enough
600VA got more Inrush current and higher price

[EUVL]

> A few remarks by EUVL on that issue in response to might help.

500VA winding on 600VA core.

Balanced F5 question

Balanced F5 question


Patrick

[alazira]

Originally Posted by qusp

i actually just asked them about this exact thing the other day, thats a good idea, i would suggest the 600va though. thats for test builds, as i have a number of power amps on the bench and they will end up either powering the aleph jx, or staying as resident test iron. i'm also looking into large 450va Rcores from japan $$$$

Unfortunately, Antec's 600VA transformers have a height of 78.74mm, which is more than EUVL's case spec of 75mm max, although not by much.
Patrick, how much tolerance on this?

[EUVL]

The distance between the top of the cradle and the bottom of the regulator heat sink is 95mm.
Other than the transformer, you need to allow for :

-- transformer mounting hardware, including bolt heads
-- TO220 rectifier diodes with P2P wiring
-- wiring to and from the diodes
-- space to avoid cooking the transformer insulation

And I am sure Antec would not be delivering exactly to 78,740,000nm, so you should allow for some tolerances.
I would not say no way, but it is getting tight.

600VA core is nice to have and not must have. 500VA already has a factor of 3 margin.
Whether you have hum or not depends also on how well the transformer is designed & made.


Patrick

[NicMac]

Amended list:

SumR (Canada)
(part number: RC0600 915 5; see post #179 and confirmed in post #181)

qusp

Toroidy (Europe)

samoloko, mravinsky, heinz1, CeeVee, NicMac

Antek (USA)

alazira

to be seen whether there is enough interest