SKU: 18690329852

DYNACO ST-70 6GH8A / 6GH8 COMPLETE STUFFED PC-3 DRIVER BOARD WITH TUBES (NOS Platinum matched pair of 6GH8A EI Philips)

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Description

DYNACO ST-70 6GH8A / 6GH8 COMPLETE STUFFED PC-3 DRIVER BOARD WITH TUBES (NOS Platinum matched pair of 6GH8A EI Philips)DYNACO ST 70 6GH8A 6GH8 COMPLETE STUFFED PC 3 DRIVER BOARD WITH TUBES (NOS Platinum matched pair of 6GH8A EI Philips) This is Dynaco ST 70 driver board PC 3. Its developed and designed to be drop in replacement and it follows original wire hole layout, but its modified to use widely available 6GH8 6GH8A 6KD8 ECF82 tubes instead of obsolete and hard to find 7199 tubes. You can find many quality NOS tubes of any of these types for normal prices and you

DYNACO ST-70 6GH8A / 6GH8 COMPLETE STUFFED PC-3 DRIVER BOARD WITH TUBES (NOS Platinum matched pair of 6GH8A EI Philips)

 

This is Dynaco ST-70 driver board PC-3. It’s developed and designed to be drop in replacement and it follows original wire hole layout, but it’s modified to use widely available 6GH8 / 6GH8A / 6KD8 / ECF82 tubes instead of obsolete and hard to find 7199 tubes.  You can find many quality NOS tubes of any of these types for normal prices and you can enjoy tube rolling with this driver board.  It’s also modified to accept modern and NOS coupling capacitors of various types and dimensions.

It’s made of hi quality epoxy fiberglass FR4 material 1.6mm (0.062’) thickness, it’s double sided with solder rings on top layer.  Solder reflow process is done on both layers and also inside every hole and blue solder mask is applied on both sides. All connections and elements on the board are silkscreened with original DYNACO numbering, so you can use original DYNACO ST-70 manual to complete it.

This is complete board! One brand new PCB, ceramic sockets, WIMA MKP coupling capacitors, silver mica capacitors, metal film, metal oxide and carbon oxide resistors and one NOS matched pair (two tubes) of 6GH8A EI Philips. They are made back in 80s in EI tube factory, under Philips licence and with some of genuine Philips materials. They were intended for export, so they have passed strict quality control. Every pair is selected from the same batch with same date codes and tubes are real platinum matched pairs, tested on my calibrated METRIX U61-B tester.

All coupling capacitors are high quality MKP Metallized Polypropylene (PP) Capacitors. 120nF are used vs original 100nF, for a bit better bass response.

Also silver mica capacitors are used, metal film, metal oxide and carbon resistors for good performance and lowest hum.

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Exchange/Return Notes
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SKU: 18690329852

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Amazon Customer
Battle Creek, US
★★★★★ 5
Good quality
Size: XX-Large, Color: White 09
Great everyday polo for the price.
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Reviewed in the United States on April 21, 2026
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FJP
Omaha, US
★★★★★ 5
Stylish and comfortable!
Size: XX-Large, Color: Green 09
Fits great, very comfortable, it stretches, the material feels just right, couldn’t be happier. I’m going to buy another.
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Reviewed in the United States on May 14, 2026
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Mike
Birmingham, US
★★★★★ 5
Runs small
Size: 36, Color: Khaki
The jeans are a nice color, and length… they run SMALL… I wear a 33-34 and bought a 36. They were skin tight but breathable material… I sent them back to order a 38
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Reviewed in the United States on May 5, 2026
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Tenacious
Chelsea, US
★★★★★ 5
I’m happy with the jeans
Size: 40, Color: Pink
I am very satisfied with this purchase. A lot of compliments too. They fit well, stretch to the material but the skinny fit look. The quality so far is great.
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Reviewed in the United States on March 26, 2026
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eddie r.
Boise, US
★★★★★ 5
Comfortable Jeans
Size: 38, Color: Khaki
Excellent pair of jeans. Super comfortable
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Reviewed in the United States on April 17, 2026

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