Studio Preamp Switching and Dimming LED’s

Triaxis, Quad Preamp, Stereo Power series, Recto Preamp

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Mongo1
Mark III
Posts: 331
Joined: Mon Dec 22, 2008 12:57 am
Location: DFW Texas

Studio Preamp Switching and Dimming LED’s

Post by Mongo1 » Sun Sep 08, 2019 5:02 pm

Hey everyone,

I’ve been away for some time. Been enjoying playing life with my Lonestar. I recently switched to a direct stereo setup and pulled the Studio Pre back into service. She sounds great, but recently I’ve noticed a few oddities. Some I can work around, some that need a solution pretty quick.
  • Popping coming out of standby
  • Bleed through from input to rec out (loop muted with volume pedal)
  • Channel switching unstable (fluttering) with remote switching
  • Lead and EQ LEDs dimming upon selection
I spent a lot of time searching the forum before posting and think it may be the LDR’s but wanted to ask the community before drawing any conclusions. I’m not familiar enough with the circuitry to correlate the symptoms.

Thanks in advance,

Mongo
Mongo

90,s Rig
Mark IV (A) combo
Simul-Satellite combo
Matching Theile 1x12 cabs

Stereo Rack Rig
Studio Preamp
Fifty/Fifty amp

Live Stage Rig
LoneStar Head
Rectifier 2x12 cab

Mongo1
Mark III
Posts: 331
Joined: Mon Dec 22, 2008 12:57 am
Location: DFW Texas

Re: Studio Preamp Switching and Dimming LED’s

Post by Mongo1 » Fri Sep 13, 2019 6:19 pm

Looking for any insights on this.
Trying to put a game plan together.
Mongo

90,s Rig
Mark IV (A) combo
Simul-Satellite combo
Matching Theile 1x12 cabs

Stereo Rack Rig
Studio Preamp
Fifty/Fifty amp

Live Stage Rig
LoneStar Head
Rectifier 2x12 cab

Mongo1
Mark III
Posts: 331
Joined: Mon Dec 22, 2008 12:57 am
Location: DFW Texas

Re: Studio Preamp Switching and Dimming LED’s

Post by Mongo1 » Sat Sep 14, 2019 9:04 am

Anyone have a current source for quality LDR’s?
I’m planning on calling Mesa next week to see if they’ll ship.
Mongo

90,s Rig
Mark IV (A) combo
Simul-Satellite combo
Matching Theile 1x12 cabs

Stereo Rack Rig
Studio Preamp
Fifty/Fifty amp

Live Stage Rig
LoneStar Head
Rectifier 2x12 cab

Mongo1
Mark III
Posts: 331
Joined: Mon Dec 22, 2008 12:57 am
Location: DFW Texas

Re: Studio Preamp Switching and Dimming LED’s

Post by Mongo1 » Tue Sep 17, 2019 9:18 am

I was able to order the correct parts directly from Mesa.

On a side note, the activity here sure seems to have dropped. Used to be much more responsiveness on topics even if the members were not intimate with the topic. Just an observation, this still a great forum with amazing members and moderators.
Mongo

90,s Rig
Mark IV (A) combo
Simul-Satellite combo
Matching Theile 1x12 cabs

Stereo Rack Rig
Studio Preamp
Fifty/Fifty amp

Live Stage Rig
LoneStar Head
Rectifier 2x12 cab

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