I need help with Dumble terminology

[ChrisGS]

There are a lot of special terms for these Dumble style amps...Could you guys clue me in as to what this stuff means?...

HRM (Hot Rubber Monkey) What is the difference in the circuit between HRM and Non-HRM.

What are the differences between the Skyliner tone stack and Bluesmaster tone stack?

From some of the stuff that I've seen here, the D'Lite seems like a very full featured amp...What makes it "Lite" in comparison to a "Non-Lite" version?

Could someone here help clear-up this confusion for me?

Thankyou,
Chris.

[odourboy]

Chris,

Have a look at these two threads (in particular, the schematics) in the Dumble Files section and much will be revealed:


https://tubeamparchive.com/viewtopic.php?t=3344

https://tubeamparchive.com/viewtopic.php?t=1902

[gearhead]

I am not a Dumble guy, but beginning that journey myself. Trainwrecks been in my blood.

I don't have the answers myself, but to get good searches, you need to put in the word "and" between topics, such as "HRM and Non-HRM".

Wasn't used to this forum type and all my previous searches were frustrating (WAY too many hits) until I finally hit the help section.

Good luck, I'm searching myself

[Normster]

I'll answer the last question first. "D'Lite" was originally a low powered stripped down version of a Dumble. It was introduced as a kit that first-time Dumble builders could use to get a taste of Dumble tone without all the complexity associated with a fully featured Dumble. However, it was designed from the ground up to be expandable into a fully featured amp.

The Brown Note production D'Lite implements all Dumble switching options. Also, the newest models use larger transformers, heavier chassis, etc.

Skyliner vs. Bluesmaster is a bit more complicated to answer. The Skyliner tonestack runs both the mid pot and bass pot in parallel to ground. The BM is wired more like a typical Fender tonestack with the bass pot wired in series to the mid pot (to ground). In terms of tone, the BM is a bit more scooped in the mids and has softer bass...not mushy, just softer.

HRM vs. non-HRM difference is primarily the post-OD tonestack. If you look at the schematics, you'll see a 2nd tone stack in place of the OD2 coupling cap.

[ChrisGS]

Thanks Norm!

...The post OD tone stack...Is that the small trimpots inside the amp?

[tele_player]

Yes, three trim pots, typically installed on a small board, with a few other parts, that sits on top of the main board.

[brownnote]

There are a lot of special terms for these Dumble style amps...Could you guys clue me in as to what this stuff means?...

HRM (Hot Rubber Monkey) What is the difference in the circuit between HRM and Non-HRM.

What are the differences between the Skyliner tone stack and Bluesmaster tone stack?

From some of the stuff that I've seen here, the D'Lite seems like a very full featured amp...What makes it "Lite" in comparison to a "Non-Lite" version?

Could someone here help clear-up this confusion for me?

Thankyou,
Chris.

Norm pretty much summed it up with his response.
A couple of other points, the chassis is smaller at 17" than the usual 19", which is a common theme in Brown Note amps, more compact, less tone-sucking or seldom used features.

This amp loaded in a compact combo measures at 18.5 X 19" x 10" and weighs in a 38 lbs with a speaker (100w Alnico Blackird)...so there's another more literal aspect of the LITE designation.

Smaller size lighter weight, expandable from 22W up to 100W if you really want that, and a very effective layout with an extremely low noise floor.

Another aspect of this design maybe that makes it a little different from other similar amps is the harmonics...not going to say better or worse than **whatever**, but it has a ton of harmonics popping out that many people really like.

Also due to the lower wattage power section, you can overdrive the clean into a very nice, non-master vintage, cranked tone with some teeth that leans up immediately with a softer pick attack. The overdrive cleans up extremely will with attack and rolling back the guitar vol a bit.

I'm out there gigging small to medium sized clubs with this amp, so many of the design aspects were aimed at that use; home, recording, and club gigs where 50 or 100W just isn't needed.

It also fits in the overhead compartment of a plane, I know cause I sent my buddy home to Ohio with one and he carried it on.

[dogears]

I agree with all Moss said except this..... I don't think there is any extra harmonics over similar amps as long as the same base circuit is used. For example, the Bludotone and Glaswerks should have every bit the harmonic content since they all use similar PI values. Even my personal Fuchs, which I have modded with this circuit has the harmonics too.

On another note, full featured for me means a built in buffered loop and usually reverb too.

Of course, I've heard that Dlite BM44 kicks ass!

Another aspect of this design maybe that makes it a little different from other similar amps is the harmonics...not going to say better or worse than **whatever**, but it has a ton of harmonics popping out that many people really like.

[ChrisGS]

Wow 38lbs. is light ! For some reason , I wouldn't have thought that an amp like that would be paired with an alnico speaker.

Anyway, I sure do like that video clip with Billy Yates and the Strat.

I have some bills to catch-up on , and I hope that by the time I have some extra cash, there are still D'Lite kits left !

[drew]

never mind . . . .

[jurgen]

https://tubeamparchive.com/viewtopic.php?t=3708