Group purchase for Jensen input transformer

[pooge]

Anyone interested in starting a group purchase for a Jensen input transformer?:

Jensen Input Transformer

Price breaks shown below:

********
JT-11P-1

1-3___ $70.00
4-11___$63.65
12-23__$59.20
24-47__$55.08
48-99__$51.23

********

 

[Peter Daniel]

I would be interested in 4pcs.

 

[leadbelly]

Count me in.

 

[pinkmouse]

How big/heavy are these? Two heavy to ship to the UK economically?

 

[pooge]

I forgot to add the option of a stud mount, shown here:

Transformer mounting option

After trying to mount the standard way, this looks like a worth while option.

Post here for your interest. I don't think there will be enough interest to start a WIKI. But if there is, we can make one later.

 

[pooge]

Count me in.

How many?

 

[pooge]

How big/heavy are these? Two heavy to ship to the UK economically?

They are pretty small. About 1 inch in diameter by 1 inch high, or so. Dimensions should be obtainable at Jensen site somewhere.

 

[jam]

I am in........................maybe we could get Peter to design us a fabulous box to put them in.

Jam

 

[ble0t]

I'd be in for two of them...

 

[pooge]

It looks like there's some interest here. I'm guessing about a dozen so far. I don't think the purchase would be worth the hassle until the 25 piece breakpoint, but we're half way there already. So maybe we should start a WIKI. Anyone know how to do this? It should include a preference for the mounting option.

 

[Jocko Homo]

I would hold out for the 25 piece price.You need to figure that postage could cost >$4 to send them out. Plus what ever shipping Jenson hits you up with added on, divided up on a per transformer basis. It makes more sense to wait for additional orders.

 

[pooge]

That's pretty much what I said. I was anticipating reaching 25 from the initial response. That's a savings of ~$30 a pair minus the cost of the second shipping.

 

[KT]

What kind of applications was everyone going to use these in?

KT

 

[pooge]

Pwer amp input. They like a 10K load, or desire a damping network if above 10K. A 10k load reflects to 13K on the primary input side.

 

[sklimek]

Pwer amp input. They like a 10K load, or desire a damping network if above 10K. A 10k load reflects to 13K on the primary input side.

Trying to understand - would you say this line transformer also works as a line filter for CMRR (?) and balanceing unbalanced signals???

please see attachment.

 

[pooge]

YES. it's the best CMRR filter. It works at much larger common mode voltages than any practical balanced amp. But that is not really a big deal. It breaks ground loops and prevents DC input, it's biggest advantages. The rest is gravy. You can get ground loops in a stereo amp from the shield loop between right and left channels. There are way of connecting these to lower this, but the transformers do a lot of things in one package. It allows a balanced or unbalanced preamp to be connected without any extra circuitry.

"Balancing an unbalanced signal" is not how I'd put it. It can present a balanced interface for an unbalanced amplifier

 

[Algar_emi]

I would take 2

 

[agent.5]

2 minimum here.

 

[AndrewT]

Hi,
being a bit of a Borders scrooge, is there a cheaper alternative that has most of the Jensen quality/performance?
My stereo system has 7 poweramps and I'm not even contemplating the 5.1 system even though it has the longest interconnects.

 

[pinkmouse]

Sowter make these.