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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SKU: 18690329852

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4.7 ★★★★★
Based on 8 reviews
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S
Verified Purchase
Susan Says
Omaha, US
★★★★★ 5
Classic wardrobe basic
Size: X-Large, Color: Black, Size: X-Large, Color: Black
Great fit and a nice lightweight fabric. The elastic in the back helps it fit a woman's curves just fine, and because these are men's shorts, they have nice deep pockets in the front. A little longer than I thought they would be, but that just means they're a modest basic look. On the whole, a good value for the money, reasonable quality.
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Reviewed in the United States on March 29, 2025
T
Verified Purchase
tlgb
San Leandro, US
★★★★★ 5
solid old style docs construction
i am a medium to wide-ish 7.5 in women's, that typically wears an 8 for room. these fit like a wider, roomy 8.5 women's. that is fine because i intend to wear them with thicker socks and for long walks.they are immediately comfortable, and do not feel like they will have the typical brutal break in period. very stable and fitted around the ankle, yet not impossible to pull on and off. they are so handsome, and meet my expectations.
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Reviewed in the United States on November 11, 2025
A
Verified Purchase
Amazon Customer
Los Angeles, US
★★★★★ 5
Get it!!
Size: 6 Women/5 Men, Color: Black Blizzard Wp
This shoe has been a dream for me. I live in an area that gets snow so having the inner lining is great. My feet haven't been cold and I’ve not felt the need to multi-layer my socks, like with other shoes. Unlike most doc marts, I did nor have to break in this shoe, its been very comfy from the get. Material is really durable and has lasted me a long time. This is a great shoe, especially for how affordable it is.
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Reviewed in the United States on December 31, 2025
C
Verified Purchase
Cody
Cuba, US
★★★★★ 5
Authentic Docs for great price!
The boots I purchased were Chelsea 2976 in Nappa leather (not the brown Crazy Horse, but the Black; such nice and soft leather!) and unisex size men's 7/women's 8/EU 39 (I'm normally a women's US 9/EU 40, but that's what fit best--see notes on sizing below). Considering the price, I was a little skeptical that these were genuinely Dr. Marten's, so I ended up bring them into a store to verify before wearing them--and multiple salespeople, who had worked for the company for 7+ years, said they looked like the real deal to them, which is amazing for the price (I got them when they were $99 online, but $160 in store; may have been a sale...?). Before ordering, I also visited the store to get the right sizing--Dr. Marten's doesn't sell my normal size in the US (EU 40), so I needed help figuring out what to buy. In the end that was either a women's EU 41 or a unisex 39. Dr. Marten's women's sizes are cut more narrow, so if purchasing women's, I needed a longer shoe to give my toes more space (EU 41, which they say is a women's US 9 but on many shoes EU 41 is a US 9.5 or even US 10). Unisex sizes are wider, so I was fine with a shorter length (EU 39). In the end, the only real difference between the women's sizing and men's sizing on the Chelsea boot was at the ankle; for some reason, the women's 41 had more of a gap at the ankle and I worried that might make it rub/blister more, so I went with unisex sizing. It might also depend on the boot, so I'd say go to the store for sizing before purchasing online. Once I got them & verified their authenticity, I got a but of things to help with weatherizing them and breaking them in (Dr. Marten's has a great kit! And, double thick socks). I did get a bad blister wearing them too long & uphill on the first day (and I had to get used to their weight; I don't have many heavier shoes). But, I used Compeed patches for the blister (should have put them on to prevent, but it was fine once they were on) and after a week of wearing them a little bit at a time, they are now super comfortable and I love them! Highly recommend!
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Reviewed in the United States on February 19, 2024
M
Verified Purchase
M
Omaha, US
★★★★★ 5
Function and style
Size: 11 Women/10 Men, Color: Black Blizzard Wp
Ideal boot for the winter, snow, mud, etc. Protect your feet beautifully, stylishly. Tip: Wear with two socks to help break in for the first couple weeks. If you are a half size, round up. This is the model without laces, makes for easy slip on / slip off for those pesky people who insist on having you take off your shoes at their house! Ha ha, you know who you are.
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Reviewed in the United States on April 13, 2026

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