If anyone is still looking for a SLP-98

I’ve been retired for 4 years now.  Worked there for almost 11 years.  I designed the ultimate upgrade for the 05 after tinkering at home for a year on my own.  Then for myself I hand wired a completely from scratch custom 2-chassis unit at home with a remote control resistor ladder volume control and input selector with display.  All teflon sockets, pure silver Kimber for hard wiring and silver solder, Mundorf’s top of the line EVO SilverGoldOil coupling caps, a completely from scratch larger power supply with a slightly higher voltage transformer, 10Hy choke, a few large electrolytic can caps and over 500uf’s of Polypropylene caps in the PS.  I installed a PS isolation circuit between the balanced input circuit PS and the other tubes that is a capacitance multiplier circuit.  
Did the last part this last year and was a wonderful improvement to the imaging. I have a hard time leaving well enough alone even now days.  
Then there’s my custom amps.  But that another story. 

A little history on the “F1” version of the SLP-98. That was originally asked for by Upscale Audio. They wanted an upgraded version of the SLP-98 with the HexFred diodes, the grayhill switch and I believe Jensen oil caps. The last few years I was there, we started doing extra things like added 10uf polypropylene capacitor’s across all the electrolytic power supply caps, higher quality coupling caps, etc. in addition to the F1. It really is a very nice preamp!

As I remember “SLP” stood for Sweet Little Preamp and “98” was the year it came out. 

@harpo75 

Yup, I've read about the Sweet Little Preamp and the 98 significance. Same with the 80. 90. 94 and the 05 I think. Apparently, Dennis Had used this "code" in a number of builds, at least preamps. Maybe he had some meaning behind all the numbers. Who knows?...........Well, you might I guess. The F1 seems to be a very nice upgrade from what I've read. Hexfred and direct coupling being more. Not sure what else is in there, several blue smaller caps, wixa or something like that? Definitely has the Jensen gold/yellow caps. Not sure what to look for as to grahill switch. Having the Lundahl step up for MC I guess is another fair upgrade. I have a photo of the guts but haven't figured how to post yet. It appears that we have to pick a host site for photos and then bring them here? Haven't done that in a good while but will try it if that's what we have to do. 

@harpo75 , I am going to hijack my own thread a little bit, but I guess since it is mine (the thread, that is) it is okay.

Anyway, a couple of generalized questions about the SLP-05, when the power supply is turned to 'ON', as I understand it (from the owners manual) all that is doing is putting it in a mode where turning the preamp knob to 'ON' will activate the power supply, but nothing else?  In other words, with just the power supply knob turned to 'ON', the only thing that is happening is that the blue LED light on the knob comes on, but if I am reading the manual correctly, nothing else?

And I am pretty sure, but I will ask anyway, that the meters on the power supply are indicating plate voltage and plate current of ONLY the rectifier tube?

Sorry, pretty simpleton questions, but I am a simpleton, and I just wanted to make sure that I was understanding this correctly.

You are right on both questions.
Yes, when the power switch is ON on the PS it is only applying power to the relay board inside the PS. This powers a small 12V transformer that powers a relay. The relay is then activated by the switch on the main Preamp when it is set to ON.
The switch on the preamp connects a ground wire back to the relay in the PS which turning on the power to the main transformer. That transformer provides the high voltage and the filament supply.
The reason for all this is to keep all AC voltages out of the actual Preamp chassis. The Preamp switch triggers the relay by connecting it to ground.
Am I explaining that well?