#1 Bijou Headphone Amplifier build
Posted: Thu Sep 08, 2011 5:55 pm
deleted
will it do the job (ive only just got the kit out off the box)
dave
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Bijou Headphone Amplifier build
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#2 bijou
Posted: Thu Sep 08, 2011 9:31 pm
well iwas thinking of useing a r core R0080-036EU from diyhifi store
will it do the job (ive only just got the kit out off the box)
dave
will it do the job (ive only just got the kit out off the box)
dave
#3
Posted: Thu Sep 08, 2011 10:38 pm
Hi Clive,
Very many thanks for your observations and I take note of what you have said. No doubt, once I start work on the kit my questions will follow and I much appreciate your willingness to be involved. The iron is waiting and watching. So am I
Regards,
Greg
Very many thanks for your observations and I take note of what you have said. No doubt, once I start work on the kit my questions will follow and I much appreciate your willingness to be involved. The iron is waiting and watching. So am I
Regards,
Greg
#4
Posted: Thu Sep 08, 2011 11:54 pm
Yep just got off the phone with Clive Very nice chap to talk to and very helpfully 
and has put a lot of my doubts and inabilities to built an try things to rest giving me the confidence to have a go very much appreciated
Thanks Clive
Time to walk the dog again
and has put a lot of my doubts and inabilities to built an try things to rest giving me the confidence to have a go very much appreciated Thanks Clive
Time to walk the dog again
#5
Posted: Fri Sep 09, 2011 12:23 am
[quote="Time to walk the dog again
don't have a dog
but yes thanks for the info, work load very high at the moment so build will be slow
dave
don't have a dog
but yes thanks for the info, work load very high at the moment so build will be slow dave
#6
Posted: Fri Sep 09, 2011 11:09 am
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#7
Posted: Fri Sep 09, 2011 4:14 pm
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#8
Posted: Fri Sep 09, 2011 9:14 pm
THANK YOU that's the tranny sortedJackOfAll wrote:Dave,
Yes, that R-core is fine.
Thinking about filament current.....
1x EZ81 @ 1A, 2x 6N6P @ 0.8A, 2x ECC88 @ 0.3A = 3.2A.
Looking at the 6.3V windings..... So you have 2x 3A windings. I'm not quite sure what the deal is with one of them being connected to the PSU board and then the series connection (12.6V) going to somewhere off-board. I'll assume that the 12.6V is being used to supply 2x ECC99's.
I'd be inclined to put the 2x 6.3V windings in parallel for a single 6.3V @ 6A winding, rectify for the signal tubes and leave the EZ81 running on AC.
Having 6A to play with gives you a little more flexibility over the 3.5A of a Hammond 370DAX, when you need to derate by x1.8 for AC->DC. You'll need ~5A if you go that way, so I like the fact that you have 6A to play with.
(i was not going to wire it as the in the photo i just used it to convey what i had in mind) ive seen modules for heater supplys but poss a diode bridge would do and you recommend a ccs for r3 i now what one is, but no idea how to implement it ! still that for future tweaks
dave
#9
Posted: Sat Sep 10, 2011 4:24 am
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#10
Posted: Sat Sep 10, 2011 11:33 am
At 0.75W a IXCP10M45 will be at about 80C, I would suggest a clip on heatsink or bit of Ali at least.
#11
Posted: Sat Sep 10, 2011 2:04 pm
Does our-Ali know about this?Nick wrote:At 0.75W a IXCP10M45 will be at about 80C, I would suggest a clip on heatsink or bit of Ali at least.
DTB
#12
Posted: Sat Sep 10, 2011 2:05 pm
I like all my bits just where they are thanks!
#13
Posted: Sat Sep 10, 2011 2:10 pm
So do we! *strokes spikey hair*Ali Tait wrote:I like all my bits just where they are thanks!
DTB
#14
Posted: Sat Sep 10, 2011 2:28 pm
Thanks poppet.
#15
Posted: Sat Sep 10, 2011 3:19 pm
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