In talking with my tech we decided to leave it that way. If you know and understand the conversations around Triode strapping, read ahead, otherwise I would strongly suggest you do some outside reading. There are ALOT of opinions out there as to the pro's and con's.Here's what I have to say, this amp sounds AMAZING. Has a very balanced sound. I REALLY like it, I was kind of surprised just how good it sounds.
NOTE - As I understand it, Triode Strapping costs some WPC. This was NOT a high WPC amp to begin with, probably around 20-22 WPC. So take that into consideration. You will need to be using this with fairly efficient speakers.
I had them set up with a pair of vintage Dynacos and it had plenty of power. Cosmetically this unit is in really good shape. There is a little spotting on the inside frame (pictured) and one of the left push buttons is not original (the top one). The faceplate is in really good shape. NOTE - These are DELICATE, many of them have much of the lettering and paint worn away.
If you clean it at any point DO SO GENTLY. NOTE - DOES NOT COME WITH A COVER.
Most of these don't have them as they were often console pulls. This went through a thorough, but respectful, upgrade.
All the stupid or dangerous! Stuff was taken care of but the general nature of the unit was kept intact. Note, I never just say "recapped" or "updated" I tell you EXACTLY what was done. And my tech is top notch and only uses parts he likes and trusts.The 7189's are matched vintage RCA. The 5AR4 is a vintage GE (I think).
The 7199's are matched vintage Sherwoods. Here's a detailed summary of the work done. Basic bench test showed No issues in main or output transformers.
X3 can capacitors will be replaced as will small caps. Stock rectifier was faulty and unable to provide correct stable bias voltage and filament voltage provided to 2 12ax7 tubes. Wired in series for pre section. Stock rectifier was removed and replaced with 1N4007 diodes and a 3/4 watt pot for adjustable Neg. Pots and slide switch was checked and are in working order.
The two rotary switches was lubed as was the three push button switches. All tubes was tested and shows marked value on tube top. The power transformer was missing all 4 washers on the main transformer bolts. These washers are needed or the bottom holding buts will slip through the chassis hole. Power rail voltage tested and retained service manual specs Power tube bias was set to -20v.
Running 430 plate voltage, Amp was tested for audio signal on all inputs and outputs and showed no issues. Listening test passed with flying colors, 100%. This amp was bought in with power tubes. Strapped, I was asked to leave in this config.
Beside the wires it's labeled BU-1. BR-2 this is,,,, BLUE 1, BROWN 2 One and two are for the power tube numbers that these wires go to on 7189 tube pin 9 They are clearly marked as well.
The above is for one channel only and will need to be repeated for the other channel. 1 CE MULTI CAP 40/40/20/20uf 500v. 1 original can cap stuffed 250/150/50uf 50v. 1 original can cap stuffed 20/30 400v.1 Standard UC 4.7uf 350v. 1 Standard UC 50uf 100v.
1 5 WATT 56 ohm resistor. 1 3/4 watt 50k pot. This is a great amp, sounds great, now in great shape, and is probably the only Triode Strapped S5000 out there.So kind of weird as well. This item is in the category "Consumer Electronics\Vintage Electronics\Vintage Audio & Video\Vintage Amplifiers & Tube Amps".
The seller is "drannie_98" and is located in this country: US. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech Republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, Sweden, Korea, South, Indonesia, Taiwan, Belgium, France, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, New Zealand, Singapore, Switzerland, Norway, Croatia, Republic of, Malaysia, Barbados, Bangladesh, Bermuda, Brunei Darussalam, Bolivia, French Guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Cambodia, Cayman Islands, Liechtenstein, Sri Lanka, Luxembourg, Monaco, Macau, Martinique, Maldives, Nicaragua, Pakistan, Paraguay, Uruguay.