Author Topic: 300B Mono blocks (Read 2318 times)

steve · « **Reply #30 on:** August 04, 2020, 08:03:48 AM »

Quote from: Nick B on August 03, 2020, 11:39:59 PM

Steve,
Did another search and found this. Can’t say I’ve ever seen an ST 70 look this good. The only time I’ve really suffered severe damage from shipping was with Fed Ex. Beautiful speakers I returned to manufacturer were pretty trashed. Had them insured and Fed Ex paid claim promptly.
Nick

https://audioxpress.com/news/the-dynaco-st-70-series-3-tube-amplifier-is-now-finally-shipping

Unfortunately, Pro Musica, Champaign Illinois, is out of business. Yes, this amp looks nice indeed.

When I started in business, UPS damaged just about every professionally double boxed preamplifier. Found out that in
Chitown, a box can literally fall 50 feet. Very early on, tried FedEx and was better, although still some damaged packages. Switched to DHL had no damages at all, not one. Shame about DHL basically closing out USA.

As I recommend, if you find a Promusica Upgraded ST-70, esp 3rd revision, get it.

cheers

steve

rollo · « **Reply #31 on:** August 08, 2020, 12:45:33 PM »

Looking at Tektron. Can use a 2A3, 45 or 300B..

charles

Response Audio · « **Reply #32 on:** August 12, 2020, 11:19:18 AM »

I recently finished the design for my personal amp. I have to have different amps for testing other products. I am going with a traditional topology using the 300B for about 8 watts. Will be using upper end components but not overboard. Do have a few "tricks of the trade" that will be utilized that I have come up with over the years. Hope to get some time to start the build over the next few weeks.
This will not be a production product. Strictly for personal and testing purposes. I simply love the 300B sound.

I am [considering] an 845 build down the road.

Any decisions yet Charles on your amp?

rollo · « **Reply #33 on:** August 15, 2020, 09:14:19 AM »

No not yet. Not in a hurry a whim thing. Using 211s now. Also have an Audio Hungary pair of mono blocks using 6C33CI. A pair of Audio Note Legend that needs repair as is was damaged in shipping.

charles

Response Audio · « **Reply #34 on:** August 15, 2020, 10:15:25 AM »

Very nice. 211s are power houses. Really like the 6C33 as well. Had a few amps in the past that used these tubes. Forgot about the 6C33. May have to put that back on my list.
Right now working on the purity Master Reference preamp. Been working on this design for the past several years. Prototype auditioning has received great feedback Finally ready to start the chassis design. Can wait to pair it up with the 300B amp. Now I just need a few more hours in the day.

doug s. · « **Reply #35 on:** August 16, 2020, 10:14:55 AM »

i saw these; look pretty interesting. i know manley makes nice amps; i had a pair of mahi mahi's; i should have held on to them longer - shortly after i sold them, manley more than doubled the retail prices. even then, they were worth it, imo. but an absolute steal, prior...

https://www.usaudiomart.com/details/649644060-manley-neo-classic-sepp-300b-power-amplifiers-price-is-for-the-pair-of-amplifiers/

doug s.

Barry (NJ) · « **Reply #36 on:** August 18, 2020, 10:39:43 AM »

Quote from: doug s. on August 16, 2020, 10:14:55 AM

i saw these; look pretty interesting. i know manley makes nice amps; i had a pair of mahi mahi's; i should have held on to them longer - shortly after i sold them, manley more than doubled the retail prices. even then, they were worth it, imo. but an absolute steal, prior...

https://www.usaudiomart.com/details/649644060-manley-neo-classic-sepp-300b-power-amplifiers-price-is-for-the-pair-of-amplifiers/

doug s.

Fairly local too, which is nice.

rollo · « **Reply #37 on:** August 18, 2020, 12:51:41 PM »

Thanks for heads up. I would have to hear before a purchase.

charles

Barry (NJ) · « **Reply #38 on:** August 18, 2020, 06:11:25 PM »

Quote from: rollo on August 18, 2020, 12:51:41 PM

Thanks for heads up. I would have to hear before a purchase.

charles

Well, they are in NJ, so not too far if they were something you were interested in...

doug s. · « **Reply #39 on:** August 18, 2020, 08:48:29 PM »

i noticed the location of the amps when i saw the ad...

doug s.

Quote from: rollo on August 18, 2020, 12:51:41 PM

Thanks for heads up. I would have to hear before a purchase.

charles

rollo · « **Reply #40 on:** August 21, 2020, 01:58:18 PM »

Again thank you Dougster.

charles

rollo · « **Reply #41 on:** September 04, 2020, 05:05:03 PM »

Picked up an Alan Eaton 45 amp. GE 45s and Sylvania 45s. uses 6SN7 as well. Point to point. Now 45 tubes are next. Emission Labs ?? The 6SN7 are Russian. Tungsol coming from Vintage Tube service.

charles

doug s. · « **Reply #42 on:** September 04, 2020, 05:27:07 PM »

is it red?

or did you contact him, and have him build one to order, w/o going the ebay route? or did you find one used?

they really look like super amps. i think i'd have gone for one of his 2a3's simply for the added 1.5-2w, but your speakers, w/the built-in powered subs, may be fine w/the 45's. the other thing i noticed about alan eaton's auctions is the monoblocks typically sell for no more than the stereo amps...

keep us posted; looking forward to what you think about them w/your rethm's. oh, did you consider nos rca 5692's, or similar nos dual rectifier tubes?

doug s.

Quote from: rollo on September 04, 2020, 05:05:03 PM

Picked up an Alan Eaton 45 amp. GE 45s and Sylvania 45s. uses 6SN7 as well. Point to point. Now 45 tubes are next. Emission Labs ?? The 6SN7 are Russian. Tungsol coming from Vintage Tube service.

charles

toobluvr · « **Reply #43 on:** September 05, 2020, 07:01:37 AM »

I'm guessing this one?

https://www.audiocircle.com/index.php?topic=172218.0

rollo · « **Reply #44 on:** September 05, 2020, 08:46:50 AM »

Quote from: toobluvr on September 05, 2020, 07:01:37 AM

I'm guessing this one?

https://www.audiocircle.com/index.php?topic=172218.0

That is the one. A start.

charles