Re: delta tone strat
Actually, with the Delta Tone pots, when the tone is set at "10" it takes the tone pot out of the circuit. So you get a no load pot. Meaning that you are bypassing the tone controls. The Hot Rails should be loud as hell. Something is wrong. Check your wiring.
I keep on hearing this about the Delta Tone system...if it is truly a delta tone, it will have a 'click' in it at the '5' or halfway position (uses a TBX tone control). It is NOT a no load pot. The Delta tone system is supposed to be neither boost nor cut when it is set at '5'. The no load pot deal was started with the American Series. That setup will have a 'click' at '9'. When it clicks, then it is on the 'no load' setting.
So, poster, does you middle tone knob have a stop at '5' or '9'? Either way you have a screwed up tone pot it sounds like, especially if the same thing happened with the stock pup when you used the controls. If at least you'll tell us where the stop in the pot is we can help you find the proper diagrams should you want to repair the existing system. If the tone pot is busted, you'll need a TBX pot if it's Delta Tone. You'll need a 'no load' pot if it's the no load system.
In the short run, I'd do as Flank suggested. This will tell you how the Rail should sound and whether or not you like it. If it still sounds weak, you may have a broken pickup. As for the long run, as I said in my previous post, I'd spend the $30 and get 3 high quality CTS pots, some good wiring and a solid 5 way switch and just drop it onto your current pickguard or onto a new pickguard.
BTW, I have a Hot Rails in my '76 Strat and it DOES scream.
Try not to get too frustrated bro, it's a learning experience.
Hope that helps
Mark