Anyone have a complete schematic of this amp?
I have only the power section stage , (and even the voltages marked)
Thanks in advance for your help!
Ampeg V7
Moderators: pompeiisneaks, Colossal
Re: Ampeg V7
In the scheme I have , there's not a date! I would to know the voltages also!
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Re: Ampeg V7
Do you have a v7 or are you just looking for the schematic? The reason I ask they made 3 versions of that model. Which version do you need?
My Daughter Build Stone Henge
Re: Ampeg V7
hi ,I haven't an ampeg ,and I don't want build an Ampeg V7 , but I need informations about his PT and voltages
Re: Ampeg V7
Two of the versions used v4 iron pushing 6V6GT
the third version used SVT iron pushing 6550
the were produced in the early 80's during the MTI years
the third version used SVT iron pushing 6550
the were produced in the early 80's during the MTI years
My Daughter Build Stone Henge
Re: Ampeg V7
Ok ,third version it's ok for me! have you some info? thanks
Re: Ampeg V7
cross reference a schematic for the SVT power section voltages. to get you in the ball park. You will most likely need to use a simulation program or do the math without having a working amplifier to take measurements off of.
I own the 2nd version V7. It's nothing to write home about.
If you want a great guitar amp buy a V4/VT-22/VT-40 if you want a great heavy hitting bass amp buy an SVT/V9. the V7 IMHO was another 80's Ampeg mistake. The preamp is a bastard V4 lacking the smooth overdrive when pushed. The Output wattage is to large to push into output tube distortion in almost any venue. I've had some positive results in the studio but let's be honest when you reach for an Ampeg I can think of a dozen other models that far exceed the V7.
I own the 2nd version V7. It's nothing to write home about.
If you want a great guitar amp buy a V4/VT-22/VT-40 if you want a great heavy hitting bass amp buy an SVT/V9. the V7 IMHO was another 80's Ampeg mistake. The preamp is a bastard V4 lacking the smooth overdrive when pushed. The Output wattage is to large to push into output tube distortion in almost any venue. I've had some positive results in the studio but let's be honest when you reach for an Ampeg I can think of a dozen other models that far exceed the V7.
My Daughter Build Stone Henge
Re: Ampeg V7
I want only to found a PT for drive 4x6550 power tube!
Re: Ampeg V7
Simple..
pick a manufacture to use, go to the website or supply house and browse for the wattage and tube type you desire.
They should have a list of tubes that work with each model of iron.
i.e.
Hammond push-pull OT running 6550B
60watt - P-T1650P
100watt - P-T1650R
120watt - P-T1650T
280watt - P-T1650W
as for the power that depends on the circuit you want to design. how much current do you want the plates to have. example. TW amps uses lower voltage to drive the amps el34's into output distortion where a marshall uses roughly 500volts with the same El34 compliment creating most of the distortion from the preamp. the voltage is a design choice. if you want it to be clean and simple I guess you could purchase any SVT PT. I have a Risson that uses 6550 Push-Pull at 400Volts. Ampegs around 800volts, and another risson pushing over 650volts. they all work to push the same tubes but sound completely different.
pick a manufacture to use, go to the website or supply house and browse for the wattage and tube type you desire.
They should have a list of tubes that work with each model of iron.
i.e.
Hammond push-pull OT running 6550B
60watt - P-T1650P
100watt - P-T1650R
120watt - P-T1650T
280watt - P-T1650W
as for the power that depends on the circuit you want to design. how much current do you want the plates to have. example. TW amps uses lower voltage to drive the amps el34's into output distortion where a marshall uses roughly 500volts with the same El34 compliment creating most of the distortion from the preamp. the voltage is a design choice. if you want it to be clean and simple I guess you could purchase any SVT PT. I have a Risson that uses 6550 Push-Pull at 400Volts. Ampegs around 800volts, and another risson pushing over 650volts. they all work to push the same tubes but sound completely different.
My Daughter Build Stone Henge
Re: Ampeg V7
P-T278CX Transformer - Hammond, Power, 400-0-400 V, 465 mAgrtamp wrote:I want only to found a PT for drive 4x6550 power tube!
My Daughter Build Stone Henge
Re: Ampeg V7
locate the data sheet for the tubes you want to use. figure out the voltage you want to send to the plates to achive the result you want. add up the amount of (mA) draw (times 1.5) required to operate your circuit and not strain the tranformer. design your power section to give you the desired voltages. After you have your voltages figured out search for a transformer that fits your needs.
This is not really a quick answer question.
If you want to stick with the V7 schematic you have. You might have luck contacting LOUD technology's service department..
1.) purchase a replacement transformer for the MTI V7.
2.) purchase a complete schematic set $35-$65.
Tip: Be very polite and talk tech to get anything out of LOUD they are not eager to sell parts. Have your credit card handy and don't bicker about price.
This is not really a quick answer question.
If you want to stick with the V7 schematic you have. You might have luck contacting LOUD technology's service department..
1.) purchase a replacement transformer for the MTI V7.
2.) purchase a complete schematic set $35-$65.
Tip: Be very polite and talk tech to get anything out of LOUD they are not eager to sell parts. Have your credit card handy and don't bicker about price.
My Daughter Build Stone Henge
Re: Ampeg V7
Thanks for your info and time selloutrr! I thought to a 278CX but it's only 115V prim.@ 6A heater. I need 220/230V on primary! and at least 6.4A only for heater.
PT ampeg SVT can be fine for me ,(I want to drive with a 12Bh7 cathode follower also) but it's rated for 6x6550 and I want build one with only four power tubes.
I think that voltage must be different with different load!
PT ampeg SVT can be fine for me ,(I want to drive with a 12Bh7 cathode follower also) but it's rated for 6x6550 and I want build one with only four power tubes.
I think that voltage must be different with different load!
Re: Ampeg V7
Do this the easy way contact your local transformer supplier.
Tell them your requirements and let them direct you to the Iron that will work for your application.
The Voltage to power 6 tubes or 4 tubes is not an issue. it's all in how you filter the power. the problem you will run into is impedance at the OT if you run a quad instead of a sixtet on a sixtet transformer.
But again contact the manufacture you want to use and discuss options they can email data sheets or direct you to the link on the website.
Tell them your requirements and let them direct you to the Iron that will work for your application.
The Voltage to power 6 tubes or 4 tubes is not an issue. it's all in how you filter the power. the problem you will run into is impedance at the OT if you run a quad instead of a sixtet on a sixtet transformer.
But again contact the manufacture you want to use and discuss options they can email data sheets or direct you to the link on the website.
My Daughter Build Stone Henge