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 Post subject: TripTop Pre Out
PostPosted: Sat Jul 06, 2019 4:02 pm 
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Joined: Sat Jul 06, 2019 3:59 pm
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What is the voltage level and source impedance at the TripTop's pre out?


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 Post subject: Re: TripTop Pre Out
PostPosted: Sat Aug 17, 2019 3:47 pm 
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Holy Ghost
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Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7500
Location: Brighton, Canada
1.25 Vrms (+4 Dbu) @ amp output clip, unbalanced, post volume control.
( same as B15 Heritage spec)

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 Post subject: Re: TripTop Pre Out
PostPosted: Sun Nov 10, 2019 8:29 pm 
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Posts: 13
Is there a vetted mod using transformer coupling from the preamp to get a 600 Ω output? I have a lot of UTC, ADC and Triad iron that may work. A mod for an original B15 or the TripTop.


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 Post subject: Re: TripTop Pre Out
PostPosted: Mon Dec 07, 2020 8:39 am 
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Joined: Tue Oct 13, 2020 6:15 am
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I've been looking into this as well. have started another thread about it.
the post preamp sound would likely be fine for what I'm aiming for but I am more interested in the final output stage into line level. a toggle switch from preamp to speaker signal would be nice too. balanced 600 ohm xlr out.


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 Post subject: Re: TripTop Pre Out
PostPosted: Mon Mar 15, 2021 11:14 am 
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I finally pulled the trigger and bought a trip top kit. Planned use is in my home studio at manageable volumes. I would like to mod the line out to have a 1:1 ratio UTC A20 which should give me a balance 600 Ω output. I plan on a toggle switch that would lift the 6L6GC kathode to save to output transformer. Is there anything I’m missing with this plan? Impedance changing?


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 Post subject: Re: TripTop Pre Out
PostPosted: Sun Mar 21, 2021 7:08 pm 
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Holy Ghost
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Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7500
Location: Brighton, Canada
Great idea!

Try a DIY RE DI pre out. : https://www.diyrecordingequipment.com/p ... ferrite-di

or maybe try to use this concept. you may need to pad the levels down a bit

https://nextgenguitars.ca/pages/whats-n ... -included/

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