http://cgi.ebay.com/ws/eBayISAPI.dll...tem=5832522729

Does anyone know anything about these? I can't seem to turn much up on Google
about these. I am not sure I was going to bid on it, since it's already at $280
with 5 days left.

Vinnie S.

"Vinnie S." wrote in message
...
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=5832522729

Does anyone know anything about these? I can't seem to turn much up on
Google
about these. I am not sure I was going to bid on it, since it's already at
$280
with 5 days left.

Vinnie S.

Vinnie

What would ten 6LB6's cost when this unit needs to be retubed?

Something to consider!

Pete

On Mon, 21 Nov 2005 17:01:12 -0500, " Uncle Peter"
wrote:


"Vinnie S." wrote in message
.. .
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=5832522729

Does anyone know anything about these? I can't seem to turn much up on
Google
about these. I am not sure I was going to bid on it, since it's already at
$280
with 5 days left.

Vinnie S.

Vinnie

What would ten 6LB6's cost when this unit needs to be retubed?

Something to consider!

I just wanted to know a little history about it. He is selling it with a second
set of tubes. But I am glad you told me anyway. Seems to have gotten alot of
lookups and is on its way to being out of my price range.




Vinnie S.

Finicky, expensive tubes.


"Vinnie S." wrote in message
...
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=5832522729

Does anyone know anything about these? I can't seem to turn much up on
Google
about these. I am not sure I was going to bid on it, since it's already at
$280
with 5 days left.

Vinnie S.

"Vinnie S." wrote in message
...
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=5832522729

Does anyone know anything about these? I can't seem to turn much up on
Google
about these. I am not sure I was going to bid on it, since it's already at
$280
with 5 days left.

Vinnie S.

World Radio Labs / Galaxy of Council Bluffs, IA (later purchased by HyGain
in Lincoln, NE) existed until the late-1970s.

Since this unit uses ten (10) - 6LB6 sweep tubes it is not a practical
amplifier -- since these TV sweep tubes are no longer produced. Might be a
nice project to convert it to a couple of Russian triodes. I would sell the
tubes for the $$

gb

"Vinnie S." wrote in message
...
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=5832522729

Does anyone know anything about these? I can't seem to turn much up on Google
about these. I am not sure I was going to bid on it, since it's already at
$280
with 5 days left.

Vinnie S

Poor amp, runs about a dozen old TV sweep tubes with all the problems that come
with them! It was a joke when first built, and hasn't improved with age. You
can get a nice Heath SB200, SB220 or SB230 for equal or less money.

Some CBer will likely get this rag and hopefully blow it up first key-down.

73, de Hans, K0HB

Hi,

This amp would +not+ be a good candidate to change
to Russian high power triodes:
The Galaxy power supply HV is only about 1000VDC,
and the linear's output tank circuit uses a "trick" circuit
to compensate for the high output capacitance
of the ten paralleled sweep tubes.

They used to say that the key for economical operation
was to change out all ten tubes for a matched set,
once the output dropped to an unacceptable level.
If you just substitute one or two new tubes at a time,
for the weakest ones, the new tubes beat themselves
to death in a hurry, trying to carry a lot of the load.
WRL used to sell matched sets of 10 tubes for around $30
when the amp was still being produced. $30 is now about
the price of +one+ 6LB6 on the audiophile market.

One interesting feature of the amp is the way the operating bias
is made to shift more toward class A if the rf output voltage envelope
departs from being linearly proportional to the input rf
voltage envelope. I never owned one of these amps,
so I don't know how well that worked in practice.

73,
Ed Knobloch


gb wrote:

Since this unit uses ten (10) - 6LB6 sweep tubes it is not a practical
amplifier -- since these TV sweep tubes are no longer produced. Might be a
nice project to convert it to a couple of Russian triodes. I would sell the
tubes for the $$

gb

"KØHB" wrote in message
.net...

Snipped

Some CBer will likely get this rag and hopefully blow it up first
key-down.

73, de Hans, K0HB

We can only hope.
Ace - WH2T