I'm looking for a replacement audio output transformer for my Drake 2B
receiver.

6AQ5 is the audio output tube, so presumably about 5K primary
impedance and 8 ohm secondary, although I'm not picky on these
parameters.

What I am picky about is that the transformer mounting holes are on 2"
centers. Looking at the AES catalog I see 2.375" centers, and also
1.5" centers, but the 1.5" one sounds really really too dinky.

Any other places I should be looking? Cannibalizing an old AA5? Don't
know the impedance parameters of those but they can't be too far off,
can they?

Tim.

See the link. I used one of these in a home brew set. Decent quality for
the $$. The 2 inch mounting vertical unit is currently out of stock. Email
Ned and ask when it will be available.

http://store.triodestore.com/tfchxfwi48oh.html

--
Bob L.
Lindenhurst, NY
wrote in message
oups.com...
I'm looking for a replacement audio output transformer for my Drake 2B
receiver.

6AQ5 is the audio output tube, so presumably about 5K primary
impedance and 8 ohm secondary, although I'm not picky on these
parameters.

What I am picky about is that the transformer mounting holes are on 2"
centers. Looking at the AES catalog I see 2.375" centers, and also
1.5" centers, but the 1.5" one sounds really really too dinky.

Any other places I should be looking? Cannibalizing an old AA5? Don't
know the impedance parameters of those but they can't be too far off,
can they?

Tim.

Hi,

Edcor also has some useful ones. 6AQ5 is good into anything from 5K-8K.
Overkill for quality, but the price is right.

http://www.edcorusa.com/products/tra...xse/index.html

Check out the XSE10-8-8k (or XSE10-4-8k for a 3.2 ohm speaker)

Cheers,

__
Gregg

6AQ5 is the audio output tube, so presumably about 5K primary
impedance and 8 ohm secondary, although I'm not picky on these
parameters.

What I am picky about is that the transformer mounting holes are on 2"
centers. Looking at the AES catalog I see 2.375" centers, and also
1.5" centers, but the 1.5" one sounds really really too dinky.

Any other places I should be looking? Cannibalizing an old AA5? Don't
know the impedance parameters of those but they can't be too far off,
can they?

AA5s usually used 50L6s or 50C5s, both of which use 2.5K output
transformers. Secondaries usually feeding 3.2 ohm speakers, so you
might be able to get by if you use an 8 ohm speaker. However, you will
take a significant loss of bass (low audio frequencies). But in a
communications radio, that may not be that important.

I could suggest the use of an L shaped metal bracket to mount the
transformer to, and to mount to the chassis, but that would look rather
ugly. You probably are concerned about the looks of the chassis, so
that's not really a viable option.

On Jun 5, 1:19 am, geek wrote:
Hi,

Edcor also has some useful ones. 6AQ5 is good into anything from 5K-8K.
Overkill for quality, but the price is right.

http://www.edcorusa.com/products/tra...xse/index.html

Check out the XSE10-8-8k (or XSE10-4-8k for a 3.2 ohm speaker)

Which has mounting centers at 2+13/16" (nearly 3"). Looks like a nice
transformer, though, and I'd forgotten that Edcor was still doing
them!

Again, my main constraint here is I need a 2" mounting center audio
out transformer. Not too picky about impedances etc., but has to fit
in the available space!

I'm surprised there isn't a market for this transformer size, because
lots of consumer equipment (e.g. AA5's, TV's, small phonos) use 2"
mounting center audio out transformers as well as much of my ham
equipment. Oh well, maybe I'm destined to cannibalize something after
all.

Tim.

Hi Tim,

On Wed, 06 Jun 2007 08:34:44 -0700, wrote:

On Jun 5, 1:19 am, geek wrote:
Hi,

Edcor also has some useful ones. 6AQ5 is good into anything from 5K-8K.
Overkill for quality, but the price is right.

http://www.edcorusa.com/products/tra...xse/index.html

Check out the XSE10-8-8k (or XSE10-4-8k for a 3.2 ohm speaker)

Which has mounting centers at 2+13/16" (nearly 3"). Looks like a nice
transformer, though, and I'd forgotten that Edcor was still doing
them!

Apologies, I realized that after I posted the Edcor wasn't.


Again, my main constraint here is I need a 2" mounting center audio
out transformer. Not too picky about impedances etc., but has to fit
in the available space!

Have you tried guitar reverb driver transformers? They're 25K:8R and fit
tiny mounting holes. Check Triode Electronics maybe?


I'm surprised there isn't a market for this transformer size, because
lots of consumer equipment (e.g. AA5's, TV's, small phonos) use 2"
mounting center audio out transformers as well as much of my ham
equipment. Oh well, maybe I'm destined to cannibalize something after
all.

Some transformer companies will do a run for a collector's group. If
you can drum up enough interest for a group buy of 50, give Phyllis Weston
a shout at Edcor :-)

Cheers!

__
Gregg

In article ain,
ldomain says...



Radiodaze has a Hammond thats 2 inch centers
John k9uwa




Hi Tim,

On Wed, 06 Jun 2007 08:34:44 -0700, wrote:

On Jun 5, 1:19 am, geek wrote:
Hi,

Edcor also has some useful ones. 6AQ5 is good into anything from 5K-8K.
Overkill for quality, but the price is right.

http://www.edcorusa.com/products/tra...xse/index.html

Check out the XSE10-8-8k (or XSE10-4-8k for a 3.2 ohm speaker)

Which has mounting centers at 2+13/16" (nearly 3"). Looks like a nice
transformer, though, and I'd forgotten that Edcor was still doing
them!

Apologies, I realized that after I posted the Edcor wasn't.


Again, my main constraint here is I need a 2" mounting center audio
out transformer. Not too picky about impedances etc., but has to fit
in the available space!

Have you tried guitar reverb driver transformers? They're 25K:8R and fit
tiny mounting holes. Check Triode Electronics maybe?


I'm surprised there isn't a market for this transformer size, because
lots of consumer equipment (e.g. AA5's, TV's, small phonos) use 2"
mounting center audio out transformers as well as much of my ham
equipment. Oh well, maybe I'm destined to cannibalize something after
all.

Some transformer companies will do a run for a collector's group. If
you can drum up enough interest for a group buy of 50, give Phyllis Weston
a shout at Edcor :-)

Cheers!

__
Gregg

On Jun 5, 4:12 pm, robert casey wrote:
I could suggest the use of an L shaped metal bracket to mount the
transformer to, and to mount to the chassis, but that would look rather
ugly. You probably are concerned about the looks of the chassis, so
that's not really a viable option.

What I don't want to do is to have to put any new holes into the
already pretty crowded chassis. I could imagine putting a different-
sized transformer underneath on a bracket but there's not an infinite
amount of room. I'll see what I can fit, but most likely I'll order
the AA5 transformer from RadioDaze that others here have mentioned.

Looks of the chassis? The top of the copper plated chassis is corroded
to brown and black. Underneath it's very clean.

Tim.