Schematic help for a Pilot 505 amp please

[oldtexasdog]

I have looked in all the usual places and can't seem to find one? Pilot 505. It has a 5AR 4,-4-,EL84's-and 2, 12AX7's.
Thanks for any help you may have.

 

[Eli Duttman]

Pilot favored paraphase splitters. Maybe that clue can help you trace things out for yourself.

What sort of features, like tone controls or a phono section, does the unit have?

 

[directdriver]

I have to guess the circuit is similar to the Pilot SA-232 amp minus the 12AU7 input stage. Use the 232 as a reference to see if it's close enough.

Here's schematic of the Pilot SA-232.

An externally hosted image should be here but it was not working when we last tested it.

 

[oldtexasdog]

Pilot favored paraphase splitters. Maybe that clue can help you trace things out for yourself.

What sort of features, like tone controls or a phono section, does the unit have?

None
I got this as pure amp chassis only.

 

[oldtexasdog]

I have to guess the circuit is similar to the Pilot SA-232 amp minus the 12AU7 input stage. Use the 232 as a reference to see if it's close enough.

Here's schematic of the Pilot SA-232.

T

Thanks directdriver!!
This at least will give me a starting point as most Mfg. used a lot of similer circuits when using the same tubes.

 

[directdriver]

Here's a bigger picture of the schematic of the Pilot SA-232 so it's easier to read:

 

[oldtexasdog]

Thanks again directdriver. This looks to be very close!

 

[old n in the way]

I believe I have schematic for that. Purchased some time ago. I will have to look for the right file, if you are still interested.

 

[Tom Bavis]

Sams 632-10 covers it, I believe. As I read it, 505 is same as 500 amp except for power supply, shown in second sheet with preamp.

 

[Tom Bavis]

Preamp and power supply:

 

[old n in the way]

Parts List

Found my documentation. Unfortunately, I scanned them at 600 dpi, too large to upload to forums. if you'd like, i can scan the parts lists at a lower resolution and upload.

 

[Eli Duttman]

Try uploading the 600 DPI stuff. I scan at 600 DPI and upload successfully. If the forum software raises a size no go flag, use IrfanView to reduce resolution.

 

[old n in the way]

Eli, maybe as jpgs, the pdfs are north of 30 Mb each. Tried to upload just one. No go.

 

[Eli Duttman]

Add GhostScript to IrfanView and converting PDFs to a "normal" graphics file type is easy.

 

[old n in the way]

rescanning to jpg is prbly easier.

 

[old n in the way]

Pilot pg 1 jpeg

If I click on my own attachment in preview, the message goes into the ether. So here is page 1 as jpeg, scanned at 300 dpi. If ya'll are interested, I'll do the rest in the same format.