Recent Posts

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Q & A / 6AN8A Substitute/Replacement
« Last post by D.M.N. on Yesterday at 09:57:40 pm »
While 6AN8/6AN8A valves can still be found pretty cheap at the moment, there are no current tube companies manufacturing new ones. Though they can be pretty long lived tubes, I have been thinking about what will happen once the supply starts to dry up, as they are used in a few other guitar amps as well Hi-Fi stereos as well. Has anyone gone about rewiring or converting their early Sunns to use a different phase inverter with any success?
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Q & A / Re: Beta Lead - loud hum with no signal
« Last post by loudthud on July 14, 2018, 08:22:11 pm »
There is a -15V source on the power amp board. Make sure it is steady and has good connections to the preamp board. The channel LEDs run off of the -15V supply.
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Q & A / Beta Lead - loud hum with no signal
« Last post by porcupine on July 14, 2018, 03:30:33 pm »
I recapped my Beta Lead and am now having some problems with it. After putting it back together I plugged into channel A. It sounded great for a few seconds and then there was a loud thump/pop sound. The channel LED went out and the amp stopped passing guitar signal, now just putting out a loud hum (which can't be controlled by any of the knobs). I shut the amp off immediately and opened it back up. Everything looked ok, nothing burnt and the fuses weren't blown, so I tried again.

Channel A worked great, and I played through it for a few minutes with no problem. Channel B worked but had a lot less gain at the exact same EQ/drive settings. I plugged into the Both input and I got the loud pop/hum again, no LEDs lighting up, and no guitar signal passing. Went back to the individual channels and I'm getting the same result. Any clues what could be wrong?
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Q & A / Re: Sunn Stinger 100 Amp
« Last post by Blue1Solo on July 07, 2018, 08:51:58 am »
We went to a club last night and the Lead Player was using a Fender Stage Lead II..and its exactly the same set up as my Sunn Stinger 100! I guess it is a re-branded Fender amp with a Sunn Label on it! The only difference on the amps was the Name Brand, and his is made in Japan, and mine is made in Tiawan..otherwise they are the same amp! I learn something new every day! Thanks to All..!
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Q & A / Re: Newer 215 bass cabs vs Older
« Last post by GrannyGremlin on July 06, 2018, 09:20:06 am »
Garnet up in Canada did that too (compression drivers in guitar cabs, often mated with 1-2 12" or a single 15").

They also did a couple reflex horn (sideways 215S style) cabs.





As well as this obvious take on Acoustics horn loaded cabs:

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Q & A / Re: Sunn Stinger 100 Amp
« Last post by EdBass on July 06, 2018, 04:39:44 am »
All of that era Sunn stuff was Fender products wearing Sunn clothes. Some pretty cool gear, some not, but Fender all the way through. Very few guitars, I believe they were made alongside Squiers,
The Sunnder 300T bass amp and T50 guitar amps are pretty cool amps IMO; Fender to the core, but cooler looking in their Sunn clothes.
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Q & A / Re: Newer 215 bass cabs vs Older
« Last post by EdBass on July 06, 2018, 04:29:00 am »
I've always thought those old Acoustic bass rigs looked bad *ss. Transistors and compression drivers for guitar, what a concept!
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Q & A / Re: Newer 215 bass cabs vs Older
« Last post by eddiemac on July 06, 2018, 02:49:44 am »
Yeah, I remember seeing Albert King on several occasions playing through a big, tall Acoustic amp with a horn near the top.  It worked for him.
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Q & A / Re: Sunn Stinger 100 Amp
« Last post by Blue1Solo on July 05, 2018, 03:58:06 pm »
EdBass.. channel one is clean..sunn type clean.different from fender..channel two has good break up w/reverb and for a amp its size, it can  get really loud..enough for a small to medium club gig with a heavy handed drummer. many people say its close to fenders red knob style amps of the 80s-90s..and I have used and played through many different amps..tubes and solid state..and how it sounds to me is close to fenders stage lead 100..but..that my opinion! Sound is Very Subjective! (I did not know that Sunn had a Guitar line!)Thanks.
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Q & A / Re: Newer 215 bass cabs vs Older
« Last post by EdBass on July 04, 2018, 12:39:41 pm »
I think the Alnico motored JBL MI drivers were phased out for the E series in the late 70's. As Isaac says, every 200S cabinet had D140F's; except for maybe some special order artist requested pieces. The 200S cab had been replaced by the 215S before the E series JBL's were introduced.
The Sentura II had a 2 X D130F cab, but the 100S came with a single D130F and a compression horn. Sounds kinda weird by today's guitar cabinet configurations, but Sunn wasn't the only one doing that in those days. There were Casinos and some early Acoustic guitar amps doing it as well.
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