These sound excellent. and have been lovingly restored from the ground up

I have used matched components during the rebuild and upgrade

Also Note: that the scale for the balance voltage is MV (mili-volts) and ideal is 0 volts, with the meter set to volts it reads “0″

Cosmetic:

1. all parts of the chassis and have been sand blasted and painted with primer and automotive paint that was color matched with the same color as the originals(clear coated)
2. the power transformers and choke have also been sand blasted primed and painted with black automotive paint (clear coated)
3. Output transformer #1 has been painted with hamertone paint to match the original
4. Output transformer #2 has the original paint and decal, it matches closely to the other but the origianl paint was in perfect condition
5. these have SDI Labs Cap Board installed with the original can caps in place for looks (they have been clear coated with automotive paint)

NOTE: the chassis do not have lettering and the rubber feet are slightly miss-matched between the amps.

aside from the feet they are they are virtually identical

Electronics:

1. NEW Power Switches
2. all new parts – Metal film or metal oxide resistors that have been hand matched
3. IEC power cord connector
4. Gold Plated input jack
5. lab grade Balance inputs
6. gold plated banana plug speaker outputs (these have been tied to the 8ohm taps – the 4 and 16ohm taps are still available under the chassis)
7. New Solen “fast caps” through out
8. Silver wire or point to point in the signal path -
9. Cloth covered wire in power supply
10. New filter caps and SDI Labs cap board
11. New tube sockets (9pin)
12. NOS tube sockets (octal)

MODS

1. :hi wattage ziener diode on the B+ to drop the voltage to 1957 levels (1957 line voltage was 110v modern voltage is about 115 to 117)
2. Thirmisters to slow the turn-on current to allow for the power output tubes to warm up before the B+ is applied
3. Higher wattage resistors in parts of the power supply to help with reliability
4. Power Switch
5. IEC Power Cord Connector
6. Gold Plated RCA Input Jack
7. Gold Plated Banana Plug Jacks

TUBES:

1. New kt66 tubes (JJ) they are matched pairs and as a quad between amps
2. NOS 5R4 Tubes – RCA  Brown Base – Matched electronically – slightly different physically
3. 12au7 matched various brands currently I am using RCA’s, I will ship with 4 closely matched NOS 12au7 tubes (I will re-test them and make sure they are still matched and sound great

I have been listening to these amps for at least 5 or 6 weeks and they sound great! all then need is a new home.

I will ship them in 2 boxes and they will be very well packed. – keep in mind that these amps weigh about 30 pounds each

NOS RCA 5r4 in W5m Heathkit

mili-volt scale balance voltage on w5m

mili-volt reading on heathkit w5m matched pair

I’m speaking here about a company called Welborne Labs,  http://welbornelabs.com/   I had ordered some parts and products from them over a month ago and promptly paid on my credit card. Fast forward to today. I have made dozens off attempts to contact them via email and by telephone on the status of my paid for order. To date I have received no replies. I do know they are receiving my emails, this is verified. They continue to send updated “specials” on their newsletter. So I would assume they are alive and well?. Are they just scamming unsuspecting people into making orders and paying for them with the intent to not ship any product?.. I do not know.. But I would say stay away from them. I will keep you all informed if I do hear from them and any resolution is forthcoming. I’m having my credit card company revese my charges at this time

Dr. “Tubeology”

I recently had the pleasure of restoring this mint condition Scott 299B. I have done work for this customer in the past. Here are Graham’s comments

“Even though I wanted this to be my “winter amp” , couldn’t wait so I hooked it up and it sounds great!

Well, of course my big honking ZU Audio speaker cables will not fit, so I made up a suitable DH Labs T-14

cable, still had some left from a spool when I was a dealer.  I also used Daren’s SilverSonic interconnects

(small RCA plugs) to complete the deal …  I used my trusty Dremel tool and cleaned all RCA’s, inside and out

plus the speaker, screw connections too.”

Thanks Graham, the Scott was a treat to service.

Pat “Head Tubeologist”

This summers projects in the works, I’m open for a deposit on a McIntosh MC240 that is now in the process of restoration. This unit will be MINT, a “10″ it gets a full new chrome chassis along with a total electronics rebuild and a warranty. $ 1,000 deposit secures it. The total price plus shipping is $ 5300.00

Next we have a Marantz 8B. This unit will clean up and be near a 9.5 in cosmetics, electronics will be rebuilt. The deposit on this one is $ 1,000 and the total price plus shipping is $ 3250

OK, I have more.. a few Fisher 500b/c’s and 800′s. An Eico HF-81, A McIntosh c20, yes C20! price yet TBD. But it will get a full face lift and all electronics rebuilt. Lot’s more stay tuned.

With vacation season upon me, times vary for finish of projects, If you are considering having me repair/rebuild any components for you contact me ASAP so I can get you in the “Q”

Happy summer, enjoy

Pat~(Head Tubeologist)

I must give a sincere Thank You! to the hundreds of customers over the years, you are the ones that have allowed us to grow. I’m very excited, the future is bright. Real Audio Glows in the Dark!

The “Tubeologist”

Basically it is just a nice – super clean Silvertone 9000 Sears Catalog Model 9000 Part Number 132-857 all American 5 tube radio.

Sears Finest - Silvertone AM Tube Radio From 1949 - American 5 tube Model number 9000-1832-857

Yup it is for sale, make us an offer

I’m just going much more in-depth. I have a highly modified Tektronix 576 scope, adding to this several precision regulated outboard power supplies, a precision ”stepper amplifier” that allows for a huge range of bias voltage’s to be applied x10 or -5 volts =-50 volts giving me a bias range from 0 to -500 vdc. I’m also adding a unique way to actually load the tube and apply a/c signals (frequency sweeps). My goal is to provide a level of test results at a “lab level” many other parameters of the tubes will be supplied in my measurement results. At this time these results are proprietary to the “Tubeology” process.. More to come soon. The “Tubeology” process is a huge undertaking so of course I’m delayed in the roll-out. But it’s going to be worth it!

In the mean time enjoy Brent’s video.

www.youtube.com/

What we have here is a Mint Condition C28 Pre-Amp MR-74 Tuner and a MC2105 Power Amp all of them are in need of a good cleaning, with the exception of the MC-2105 which will need new glass because this one has the typical de-lamination / bubbling on the inside of the glass. Also a bit of trivia, the MC2105 was used on stage by Bob Weir one of the members of the Grateful Dead back in the late 70′s and early 80′s. How Cool Is That?

Check back soon to see them brought back to their original specs and appearance and if you are interested in purchasing them feel free to send us an offer.

Very nice and clean C28 Mcintosh Pre-amp before restoration

A very Nice McIntosh MC-2105 Amp in an original wooden case, too bad there are bubbles on the glass

Now that I have this I will be listening to FM now. A minty MR74 before restoration.

Bob Weir of the Grateful Dead in his home studio with his new McIntosh -

Here is a photo of Bob Weir in his studio with his new Mcintosh Gear check it out on the Mcintosh Labs website here