Jerry:
Aha!? As I suspected....thanks Jerry.? I have an RR-2 product sheet here too but no mention of the LA-4.? That price list sheet is new to me - will print that one for my files.
Now...if we could just get a pic of the LA-4.....I'd love to know what is actually?in my one RR-1 with the "line amp on steroids"!? It's definitely worth more than $20, even in 1970's money.
73...tnx again...
Peter VE7PS
PETER ¨C See attached the following: ? - Commercial Maritime Price List dated July 15, 1975.? The LA-4 Audio Line Amplifier is Model 1228 and priced at $20.00.
- RR-2 Product Data Sheet dated April 1975.? On Page 3, a Line Amplifier is listed as an Accessory and mentioned in Audio Output specifications associated with providing 600 Ohm line audio.
? Jerry, N4JL ? ? Rex: My take on the LA-4 was that it was a Line Amp as well, given that the LA-7 was a REAL item - I have one.? It was a Line Amp for the RR-3 and R-4245 which were made for the Marine Reserve market. The earlier marine reserve radios...the RR-1 and RR-2, both based on the SPR-4, show in some ads an optional Line Amp option that was available, though I do not see any ads that show a model number.? Makes sense that it would have been an LA-4.? If someone has an ad or manual that shows it, please let us know.? I have yet to check my RR-1 manual and will do so. I do have an RR-1 receiver that is loaded up with a line amp system, though it consists of a couple of large PC boards, quite unlike the LA-7, which I also have as a stand alone board....yet to be installed.? The LA-7 was offered as an option for the RR-3 and R-4245. Also...I'd like to see that "LA-4" amp if someone could send me the link.? My search of the auction sites has proved fruitless.? I have?run into this problem before with E-Bay?USA.....somehow, certain things are blocked, yet I have no search filters on.? Puzzling! ? in the 3 years that I worked at Drakes I never heard of a Drake LA-4 and never heard anyone there talk about a LA-4. ? On Wed, Apr 17, 2024 at 4:44?PM Steve Wedge, W1ES/4 via <w1es=[email protected]> wrote: It made sense back when it was built and the tubes were $2 each.? It's more of a curiosity than anything else now. Time flies like an arrow.? Fruit flies like a banana. On Wednesday, April 17th, 2024 at 12:31 PM, Steve Wedge, W1ES/4 via <w1es=[email protected]> wrote:
This is definitely a well-executed homebrew that someone made to match his station, though the front panel may be the only thing that had to be modified.? I say this having seen examples of ¡°Drake¡± station monitor scopes that were obviously repainted Heathkit scopes. Time flies like an arrow. Fruit flies like a banana. On Wed, Apr 17, 2024 at 11:57 AM, Jerry Kessler <N4JL.cw@...> wrote: A real Drake LA-4 is an Audio Line Amplifier. Not what is shown on the auction site, which appears to be homebrew. Interesting effort, though. ? Jerry, N4JL ? ? My GUESS would be, that this is an interesting home brew fabrication, but who knows?? There were a lot of CB amps built with 2/4/6 sweep tubes.? These days, it would cost a fair amount just for 6x 6JB6's :-) John ? On 2024-04-17 08:05, Dick wrote:
> Anyone ever heard of this amp ? A Google search
>? comes up empty.
>
>? It's listed on that Auction Site.
Interesting - 6 sweep tubes.? You'd need to gin up
a power supply for it;? I'd guess 800V at a half amp or so + filaments.?
The connector looks a little oddball; like an octal plug, only 11 pins.?
I think SBE used similar on their
amp.
? ?I'd expect it to struggle on 10M because of the interelectrode
capacitances.? I once
built a linear with 4 6LQ6 tubes.? 10M was not attainable, and the
loading coil for 15M was like a half a turn.
? ?I have a Swan linear of similar vintage & design.? It also has 6 sweep
tubes.? I got it
for a song at the flea market, sans tubes.? I have replacement tubes,
but a different type, and they take a different socket.? Amazon yielded
up matching ceramic sockets.? That's in the forever queue of future
projects.
? ?Back in the day, sweep tubes were cheap because they were made in the
millions for TV sets.? That is no longer the case.
? ? ? ? ? ? ? ? ? ? ? ?- Jerry, KF6VB
>
>? 73, Dick, W1KSZ
>
>
> Links:
> ------
> [1] /g/DRAKE-RADIO/message/77253
> [2] /mt/105579079/243852
> [3] /g/DRAKE-RADIO/post
> [4] /g/DRAKE-RADIO/editsub/243852
> [5]
> /g/DRAKE-RADIO/leave/12260778/243852/767576506/xyzzy
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