I’m stateside, and have an order ready to go at Digi-Key and Mouser for mini-A, DCB1 and a pair of LM3886 chipamps.
I’m building the mini-A using Brian’s boards. For now, it’s the low power version with 15 volt rails as opposed to the Aleph 30.
But the IRFP240 that is called out on Brian’s BOM is out of stock at both Digi-Key and Mouser.
I need 4 for the mini-A and another 4 for the DCB1(I’m building two of these).
I noticed on the DCB1 BOM, you can substitute IRFP140’s for the 240’s
Can I do that for the mini-A?
Is that substitution in the mini-A a compromise soundwise?
IF so, I will just wait the few months for the IRFP240’s.
I also noted that at Digi-key, there are IRFP140 (International Rectifier) and IRFP140BP (Vishay), with the Vishay’s being twice as expensive as the IR”s.
Top level specs don’t seem different in any way. But there must be a difference, one that might affect which one I buy if I do the substitution for the mini-A?
Thanks for the help, greatly appreciated.
Curt
I’m building the mini-A using Brian’s boards. For now, it’s the low power version with 15 volt rails as opposed to the Aleph 30.
But the IRFP240 that is called out on Brian’s BOM is out of stock at both Digi-Key and Mouser.
I need 4 for the mini-A and another 4 for the DCB1(I’m building two of these).
I noticed on the DCB1 BOM, you can substitute IRFP140’s for the 240’s
Can I do that for the mini-A?
Is that substitution in the mini-A a compromise soundwise?
IF so, I will just wait the few months for the IRFP240’s.
I also noted that at Digi-key, there are IRFP140 (International Rectifier) and IRFP140BP (Vishay), with the Vishay’s being twice as expensive as the IR”s.
Top level specs don’t seem different in any way. But there must be a difference, one that might affect which one I buy if I do the substitution for the mini-A?
Thanks for the help, greatly appreciated.
Curt
Banned
Joined 2002
If you are building the MIni Aleph, you only need 4 IRFp240's they don't have to be matched either.
Picasa Web Albums - Jase - Mini - A
I think i might have 4, i could look if you want.
J'
Picasa Web Albums - Jase - Mini - A
An externally hosted image should be here but it was not working when we last tested it.
I think i might have 4, i could look if you want.
J'
Thanks very much everyone for the help on this. Looking at Digi-Key once again quickly I see that
IRFP140NPBF made by International Rectifier are $1.84.
IRFP140PBF made by Vishay/Siliconix are $4.47.
Is there something I should know about the International Rectifier version
?
Reason why I ask is that I will eventually build the Aleph 30 version which use a fair number more output devices.
If the lower priced ones from IR are are perfectly fine then thats quite a savings.
And yeah, J’, if its really no trouble, could you take a look and see if you have 4 IRFP240's and what you would like for them including shipping to California?
Oh and I have never seen that version of the mini-A circuit board. But then again, I have not been around here very long.
The boards I have from Brian (chipamp.com) are black with gold vias.
Regards
Curt
IRFP140NPBF made by International Rectifier are $1.84.
IRFP140PBF made by Vishay/Siliconix are $4.47.
Is there something I should know about the International Rectifier version
?Reason why I ask is that I will eventually build the Aleph 30 version which use a fair number more output devices.
If the lower priced ones from IR are are perfectly fine then thats quite a savings.
And yeah, J’, if its really no trouble, could you take a look and see if you have 4 IRFP240's and what you would like for them including shipping to California?
Oh and I have never seen that version of the mini-A circuit board. But then again, I have not been around here very long.
The boards I have from Brian (chipamp.com) are black with gold vias.
Regards
Curt
Banned
Joined 2002
Those are the SMD version only a few boards were mad, and i had most dibs on them
Id be happy to send you the IRF's no problem, ill look this afternoon.
When i bought all my parts i bought all dale resistors and all the higher end cap's. I have 4 of them running at 18-19V rails cant remember exactly.
I will be changing my psu soon to the new black psu boards and a crc psu, as it sounded better than just 2 caps and diodes.
CRC is worth every penny, and i love the mini alephs lots of power clean sound and easy to build.
J'
Id be happy to send you the IRF's no problem, ill look this afternoon.
When i bought all my parts i bought all dale resistors and all the higher end cap's. I have 4 of them running at 18-19V rails cant remember exactly.
I will be changing my psu soon to the new black psu boards and a crc psu, as it sounded better than just 2 caps and diodes.
CRC is worth every penny, and i love the mini alephs lots of power clean sound and easy to build.
J'
Banned
Joined 2002
J'
Yup., black and gold, real beauties.
But I cant seem to come up with a picture of them at the moment.
On sale now till end of January at Brian's site.
BTW, I really like SMD, actually prefer to build that way when the low power levels will let you get away with it.
So yeah, those are nice SMD boards you have pictured there.
Curt
Yup., black and gold, real beauties.
But I cant seem to come up with a picture of them at the moment.
On sale now till end of January at Brian's site.
BTW, I really like SMD, actually prefer to build that way when the low power levels will let you get away with it.
So yeah, those are nice SMD boards you have pictured there.
Curt
Banned
Joined 2002
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.