Ampeg PF-20T to (power) amp

[Zbysek]

Hi Zbysek



Let' s look what' s inside the box!

View attachment 3231652

Happy NAD!


greetings

Wise(b)ass

Do you remember not wanting opening the box on Christmas when you were kid? I thought the magic would be lost when I open it... That's me right now!

 

[High Camp]

So I tried it out yesterday:
Cabs: one PF115HE, one PF210HE
head: PF50T
head: Micro VR

The bass went into the PF50T.
- tranny out >> p.a.
- preamp out (post) >> Return Send of the Micro VR (using a simple XLR to jack microphone cable)
- Micro VR feeding the two Portaflex cabs

Worked very, very well indeed.
The p.a. guy was very pleased with the sound he got from me, didn't tweak a thing.
(My bass was very well heard by the audience, I received compliments for the sound as well)

On stage I was asked almost immediately during soundcheck to back off the volume: mission accomplished.
Now I have loads of volume to spare, great sound on stage and great sound for the audience.

Only one thing could improve this: a PF150T, or something like it.
The V4B is great, it's a master, but it's too wide for the Portaflex cabs and I really enjoy the 5-way mid selector that the PF50T has.

 

[Zbysek]

View attachment 3234229 View attachment 3234230 View attachment 3234231 View attachment 3234232 View attachment 3234233
So I tried it out yesterday:
Cabs: one PF115HE, one PF210HE
head: PF50T
head: Micro VR

The bass went into the PF50T.
- tranny out >> p.a.
- preamp out (post) >> Return Send of the Micro VR (using a simple XLR to jack microphone cable)
- Micro VR feeding the two Portaflex cabs

Worked very, very well indeed.
The p.a. guy was very pleased with the sound he got from me, didn't tweak a thing.
(My bass was very well heard by the audience, I received compliments for the sound as well)

On stage I was asked almost immediately during soundcheck to back off the volume: mission accomplished.
Now I have loads of volume to spare, great sound on stage and great sound for the audience.

Only one thing could improve this: a PF150T, or something like it.
The V4B is great, it's a master, but it's too wide for the Portaflex cabs and I really enjoy the 5-way mid selector that the PF50T has.

I am glad it worked for you!

Have you tried feeding one cab from the PF head and second cab from the VR head?

 

[High Camp]

I am glad it worked for you!

Have you tried feeding one cab from the PF head and second cab from the VR head?

No I haven't actually.
It's a blend that could work.
On the other hand, if I would stick with the volume that the PF50T can give, i'd rather go all tube with both cabs.
When in need of extra volume, I now will go with the post #82 set-up.
(by the way, IMHO, the Micro VR on it's own is a great head too. This of course is not really news, haha. Anyway, I use the classic Micro VR/SVT210AV set-up for rehearsals)

 

[donbassist]

By now this is a stupid question. PF20T power transformer. 2 years ago, got one as a basket case. Tried ampeg, and here on TB. This amp has no power transformer. Ampeg couldn't get them. The original manufacturer did not have the specs on them. Said if I could come up with the specs, they could make it. Does anyone have a schematic on this thing. Or be able to check the pin outs on the transformer and tell me the voltages, and where they go..........so I can get it working.

 

[Mushroo]

By now this is a stupid question. PF20T power transformer. 2 years ago, got one as a basket case. Tried ampeg, and here on TB. This amp has no power transformer. Ampeg couldn't get them. The original manufacturer did not have the specs on them. Said if I could come up with the specs, they could make it. Does anyone have a schematic on this thing. Or be able to check the pin outs on the transformer and tell me the voltages, and where they go..........so I can get it working.

Let the folks in the Official Portaflex Thread know where you are located, geographically (you didn't fill out your profile) and I'm sure they can recommend a competent Ampeg tech in your region:

Official Ampeg Portaflex Club

 

[ximun]

Hello, I have read all the thread even if way too technical for me often

I have a silly question. In theory, could I plug a PF-20T (that I don't have and don't need ) in my RB115 combo by the effect loop ? Would the combo replace a cab or would I benefit also from its wattage ?
Or would the planet explode ?
Thanks

 

[Wasnex]

In theory, could I plug a PF-20T (that I don't have and don't need ) in my RB115 combo by the effect loop ?

If the effects loop on the RB115 is line line, you can rig of an XLR to 1/4" adapter an run either the PF20T's Preamp Out or Transformer Balanced Line Out into the return. This connection may cause the combo to hum or it may work fine.


Running the Send from the RB115 to the instrument input of the PF20T will most likely not work well due to level mismatch.

Would the combo replace a cab or would I benefit also from its wattage ?

A better way to describe the connection above IMHO: The PF20T is replacing the RB115's preamp. So you won't be using the PF20T's power unless you plug its speaker out into another cab. You will be using the RB115's power with the internal speaker.

 

[ximun]

Thanks for your answer