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WTB: Sanken SAP15N & SAP15P (or STD03N & STD03P if compatible)

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dtm1962

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Joined 2003
#1
I have the Cambridge Audio A500 integrated amp with the blown output devices.

I cannot find a source to purchase unless I buy 1000 min. quantity.

The distributor will NOT supply samples to me/my company of either set. (assuming the SAP versions is obsolete)

Does anyone have 2 pairs of either devices to SELL in order for me to use in my amp.

Can I use the STD03 series without too many mods ? (Add a resistor on the emitter etc.)

Any help would be appreciated.

Thanks


__________________
Dan
 
#3
PigletsDad said:
Farnell in the UK certainly list them in small quantities. I expect they will sell direct to you over the net. Part numbers are 1182829 and 1182830.


Newark are their US affiliate, maybe you can buy through them if Farnell UK won't help.
Click to expand...


SAP15's are no longer available. SAP16's were the preferred replacements for the last few years, but Profusion lists a last-time buy this May or June. But you can still order them. I have just ordered and received a couple of STD03's from them.

http://www.profusion.co.uk/

Jan Didden
 
#4
No one have no spares to sell????

At $49 per shipping from Profusion, I don't believe it's a good value paying this outrageous shipping charge!

Does anyone have a pair of SAP16N (or SAP15N) and SAP16P (or SAP15P) to sell for $25-35 USD shipped Canada?

Let me know.

Thanks in advance,

Dan
 
#5
Re: No one have no spares to sell????

dtm1962 said:
At $49 per shipping from Profusion, I don't believe it's a good value paying this outrageous shipping charge!

Does anyone have a pair of SAP16N (or SAP15N) and SAP16P (or SAP15P) to sell for $25-35 USD shipped Canada?

Let me know.

Thanks in advance,

Dan
Click to expand...

Well, I probably have a pair of SAP16's spare. Let me check what I paid for them (and the shipping from profusion ;-) ) and I'll get back to you.

Jan Didden
 
#8
You can get SAP15 transistors from FARNELL here:

http://uk.farnell.com/jsp/Semicondu...+SANKEN/SAP15N/displayProduct.jsp?sku=1182829

btw, does anyone know much about the Cambridge Audio A5 Amp.

I fried the fuses on the power supply and was wondering if anyone had any experience with this?

The transistors in question look fine, and i cant detect any short circuits with a DVM? Do the Cambridge Audio A5 fuses protect the circuitry well?

Suprisingly, i was only running it loud, there was no shortcircuit or "fault", it just got too hot i think. This was dissapointing, since I assumed Cambridge Audio would offer similiar protection as the A1 Chipamp, which simply cuts out if its overdriven. Anyway, im interested in any replies here.

thanks
 
#10
To eliminate the emitter resistor : Do you cut the Sensor Leg or the Emitter Leg and terminate 0.22W Resistor in series with the Emitter? Sensor?

I have new SAP16's ready to put in so would it better to put say 3W units external and it would be more reliable?

What rating is the internal emitter resistor anyways?
 
#12
dtm1962 said:
To eliminate the emitter resistor : Do you cut the Sensor Leg or the Emitter Leg and terminate 0.22W Resistor in series with the Emitter? Sensor?

I have new SAP16's ready to put in so would it better to put say 3W units external and it would be more reliable?

What rating is the internal emitter resistor anyways?
Click to expand...

Dan,

I'm waiting for your response to my email on the SAP16's. Do you still want them? Please let me know.

Jan Didden
 
#13
Sorry Jan!

I did finally find a source of SAP16's in Canada and in the process of ordering some replacements. I have been away on vacation thru the weekend.

Sorry about not responding sooner as I forgot about your current offer.

Dan
 
#14
Thanks for the tips.

I checked the emitter resistors and they read correctly at around 0.22R, with no darlington shortcircuits either. So luckily for me, I replaced the fuses with the correct type, and the amplifier operates perfectly.

I guess it suffered some sort of thermal runaway. After checking the datasheets for these SAP15 devices i notice the maximum power dissipation rating exceeds the power deliverable by the power supply with these fuse ratings, whence the reason the trannies survived maybe🙂

btw, does anyone know what the LEDs in this CA amp are for? its an indicator? or just implemented as diodes with prefered characteristics?

Cheers
 
#15
Voltage references for current sources in the circuit.

The problem with the A5/A500 is poor heatsinking. The heatsink is just an L-angle with folded metal fins.

The Cambridge amps that use LM3886 use this particular IC's "SPIKe" protection, which is on die and therefore very responsive. The SAP based circuit Cambridge used just has regular VI limiting.
 
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