Options for the ST-70 Tube Amplifier

Please contact us to discuss ordering. 

ST-70 Resistors (Amtrans Carbon Film AMRG Series) 

Made to take the place of the legendary Riken Ohm Carbon Film resistors. These are simply the best sounding resistors you can put in the ST-70. Worth every penny.  Imported from "land of the rising sun." These are non-magnetic, encapsulated in a black anodized aluminium case, the end caps are brass, they are potted in a highly thermally conductive resin. These resistors have gold-plated oxygen-free copper leads.

NOTE: subject to availability, may require additional lead time to acquire these components.

$185.00

Amtrans Carbon Film AMRG Series

Amtrans Carbon Film AMRG Series

ST-70 Resistors (Amtrans AMRT Carbon Film + Takman REX) 

Exceptionally smooth and quiet, these are incredibly great sounding audio specific carbon film (± 5%) resistors that will not disappoint.

$80.00

Amtrans AMRT

Takman REX

ST-70 Resistors (PRP Audio Grade Metal Film) 

Nice crisp and tight sounding audio specific 1% metal film resistors.

$80.00 

PRP Audio Grade Metal Film

PRP Audio Grade Metal Film

ST-70 Resistors (Takman Carbon Film & Metal Film Mix) 

Beautiful sounding audio specific carbon film and metal film resistors.  NOTE: all values needed to populate the entire PCB may not be available, equivalent substitutes may be necessary for some locations.

$100.00

Takman REY (carbon film) 

Takman REX (metal film) 

ST-70 Resistors (Standard Carbon Film & Metal Film Mix) 

If you want a combination of carbon film and metal film resistors choose this option. Carbon films in the audio path, metal films in the power circuit.  NOTE: actual colors will vary, images are representative samples only.

$60.00

Carbon Film

Metal Film

ST-70 Resistors (Standard Carbon Film & Carbon Composition) 

This option includes a mix of Carbon Films and Carbon Composition Resistors. Fantastic sounding resistors. 

$60.00

Carbon Film resistor

Carbon Composition

ST-70 Resistors (High Grade Metal Film) 

This option is a mix of High Grade Metal Film Resistors by Dale, PRP and TE Connectivity / Holsworthy. 

$70.00

Dale Metal Film Resistors

PRP Audio Grade Metal Film

TE Metal Film Resistors

Capacitor Options for the ST-70

ST-70 Capacitors - Vishay 1839HQ 

Super affordable caps with premium sound and performance. Complete set for the PC-3 circuit board. Full bodied and open soundstage, very nice for their price. "Metallized Polypropylene Film Capacitors MKP Axial Type", plastic-wrapped, epoxy resin sealed. Flame retardant.

$65.00

 Vishay 1839HQ  

 Vishay 1839HQ  

ST-70 Capacitors  (Amtrans AMCY-Golden Black + TRW)

Four Amtrans "Golden Black" Aluminum Foil Paper in Oil  coupling capacitors.  Absolutely stunning sonics, transparent and realistic, a very detailed and holographic presentation.  Imported from "land of the rising sun."

Two (NOS) Bypass Capacitors by TRW

NOTE: subject to availability, may require additional lead time to acquire these components.

$190.00

Amtrans "Golden Black"

Amtrans "Golden Black"

ST-70 Capacitors  (V-Cap ODAM / V-Cap Tone)

A "top-of-the-line" capacitor offering for the ST-70. V-Cap ODAM is a Reference Grade Capacitor (Oil Damped Advanced Metalized) . THE ODAM series is a ‘wet’ capacitor, meaning the entire winding is not only 'impregnated' with fluid, but also immersed & hermetically sealed in it... forever... The leads are cryogenically treated OFC copper.

The (4) .1uF coupling caps are V-Cap ODOM, the (2) .047uF bypass caps are V-Cap TONE (Copper Foil in Oil). Made in USA. (V-Cap ODAM is not available in a .047 value, that's why I use the TONE caps for the bypass).

Read about both of these incredible caps and see their reviews at V-Cap.com

$295.00

V-Cap ODAM

V-Cap ODAM

V-Cap Tone

ST-70 Capacitors  V-Cap TONE / MOD

Another top-of-the-line capacitor offering for the ST-70. The V-Cap TONE is a ‘wet’ PIO capacitor, which means the winding isn't just impregnated, but also fully immersed in fluid, and then enclosed with mil-spec glass hermetic seals. Unlike many traditional ‘oil cap’ designs, your TONE cap will NEVER dry out. Solid-core, tinned pure copper leads.

The four .1uF @630V coupling caps are V-Cap TONE Reference Grade Capacitors (Copper Foil in Oil)  , the two .047uF @ 600V bypass caps are from MOD (Wet, hermetically sealed copper foil polyester film immersed in oil) . Super smooth and detailed presentation. Very pleasant and engaging.

$235.00

V-Cap Tone

MOD Capacitors

MORE OPTIONS FOR THE ST-70

Belton Gold Contact 9 pin Black Tube Sockets

The best tube sockets you can get for the ST-70 driver tubes! Two premium grade Gold Pin Sockets, Black Glassfiber filled PPS Insulating material. Superior heat resistance and shielding for the two driver tubes on the amplifier circuit board. Gold plated pins for improved signal transfer and corrosion resistance. 

$30.00

Gold Pin Belton 9 Pin

Gold Pin Belton 9 Pin

Ceramic Gold Contact 9 Pin Tube Sockets

Two premium grade ceramic sockets with gold contacts for the ST-70 circuit board. Superior heat resistance and shielding. The gold plated pins provide improved signal transfer and corrosion resistance.

$20.00

Ceramic Gold Pin

Ceramic Gold Pin

ST-70 Binding Post Upgrade

Due to limited space in the chassis opening I can only install 3 binding posts per side. This means that one of the 4, 8 or 16 Ohm outputs will be unavailable. Generally I omit the 16 Ohm taps but the choice of which one to eliminate is up to you, just let me know. The binding posts will accept banana plugs or bare wire. This is a great upgrade for the ST-70.

$65.00

ST-70 Binding Post

ST-70 Binding Post

ST-70 Binding Post

Spade Terminal to Banana Plug / Binding Post Adapters

(Sold only in quantities of 4) Add binding post / banana jack capability to you speaker terminals. These are super handy if you don't fancy the idea of connecting bare speaker wire directly to the screw down terminals. Makes connections much easier and a bit more reliable.

$12.00

Spade Terminal Adapters

Spade Terminal Adapters

Spade Terminal Adapters

ST-70 Stereo / Mono Switch Delete

If you do not want the stereo / mono switch on your ST-70 select this option. The chassis opening will be blocked off when the switch is omitted and the amplifier will operate in stereo only. NOTE: If you plan to use the ST-70 in a monobloc configuration you will need the switch to be installed. 

$20.00

ST-70 Stereo / Mono Delete

ST-70 Stereo / Mono Installed