Have you ever wondered why

This is a question that would be better addressed on the Bottlehead forum.

Way back when Western Electric was designing bigger and bigger transmitters, they ended up with iron designs that became difficult (if not impossible) to be wound because of size. They developed parallel feed to address this, which requires twice the individual pieces of iron (a choke and an output transformer per channel), but each piece ends up being less than half the weight of the original.

Because they are cheap?, posted on February 11, 2015 at 17:22:54
Chip647 Audiophile Posts: 2652 Location: The South Joined: December 24, 2012	Magenquest does wind big transformers, I have some. Smaller is cheaper.

Parafeed?, posted on February 11, 2015 at 17:59:34

Ivan303
Audiophile

Posts: 48887
Location: Cadiere d'azur FRANCE - Santa Fe, NM
Joined: February 26, 2001

2A3 Parafeed.

I have a pair of parafeed 2A3 OT from Bottlehead/Magnequest which are quite expensive but small.

First they came for the dumb-asses
And I did not speak out
Because I was not a dumb-ass

RE: Because they are cheap?, posted on February 11, 2015 at 18:10:50
Tre' Industry Professional Posts: 17304 Location: So. Cal. Joined: February 9, 2002	A parafeed OPT doesn't have to be as large as a series feed OPT to handle the same AC (and be just as good at it if not better) because the parafeed OPT is not having to handle the DC. But you need a plate choke. Tre' Have Fun and Enjoy the Music "Still Working the Problem"

RE: "But you need a plate choke.", posted on February 11, 2015 at 18:20:51
Ivan303 Audiophile Posts: 48887 Location: Cadiere d'azur FRANCE - Santa Fe, NM Joined: February 26, 2001	In which case, 'big' is OK. First they came for the dumb-asses And I did not speak out Because I was not a dumb-ass

RE: Because they are cheap?, posted on February 11, 2015 at 19:37:56
Caucasian Blackplate Industry Professional Posts: 8313 Location: Seattle Joined: June 18, 2004	Big Magnequest transformers are typically their gapped units, or parallel feed units designed for high power/voltage designs. (Like the FS-100PF, I have a pair and they are huge!)

No slap at Magnequest, posted on February 11, 2015 at 23:01:15
Frihed89 Audiophile Posts: 15703 Location: Copenhagen Joined: March 21, 2005	I am working my way through the 025 series. DS-025 to ES-025 to....something silver, in a while.

RE: Because they are cheap?, posted on February 14, 2015 at 08:34:18
mqracing Manufacturer Posts: 4323 Joined: June 29, 2000	You hit the nail on the head, Tre. Thanks. Builder of MagneQuest & Peerless transformers since 1989

SET Asylum

Have you ever wondered why

2.106.16.211