[Boatanchors] Lafayette HA-350

[manualman at juno.com]

Back in 1964 when this receiver was introduced, Trio wrote the entire
manual in Japanese. The manual was then transcribed into English.  A lot
of info can get lost in the translation. It was also sold under different
names in Europe. Asia, and the Far East.

The manual you were using was an initial translation and was printed
quickly to get the receiver to market. 
On page 2, Technical Specification, under Frequency Coverage, it says
"WWV on 51 Mc" Should be 15 Mc. There were a number of other errors
through out that initial manual. 

The second iteration of the manual was better but didn't get any
distribution in the U. S.
The third and final iteration cleaned up most of the errors. I think
there was some minor "Oops" still on the schematic but can't remember
what it was.

The receiver front end expects to see roughly unbalanced 50 to 75 ohm
impedance. Long Wires or balanced line connections can drive the
preselector to receive strange things and is quite critical even with the
proper impedance connections. Strong signals can easily bleed-though the
RF and Mixer sections.

The receiver looked great but had a number  of design flaws or omissions
to make it not a great amateur band receiver. I think it only lasted
about 15 months in our Lafayette active product line.

Pete, wa2cwa
www.manualman.com

On Tue, 31 May 2022 12:13:01 -0400 "Jeffrey L. Bauman via Boatanchors"
<boatanchors at mailman.qth.net> writes:
> Thanks, Jerry.
> 
> Gotta love it when the block diagram identifies 2nd mixer V3 as a 
> 6BE8 and
> the schematic (and in reality) a 6BE6. The two tubes are not even 
> close.
> 
> And thanks for the PDF.  It's much better than anything else I've 
> seen ....
> And I've seen a lot.
> 
> I actually think I may have an original manual somewhere ... I 
> bought an
> HA-350 brand new from Higgins & Scheer in Poughkeepsie, NY when I 
> was
> working there part time during high school +/- 1969. It replaced my
> Hallicrafters S-107 and I thought I had died and gone to heaven. 
> Propagation
> was fabulous back then and I worked the world on CW and AM with my 
> DX-60 /
> HG-10. 
> 
> I now have about 5 of these radios and I'm thinning the herd - but 
> I'll
> never be without at least one to use!
> 
> 73,
> Jeff
> 
> -----Original Message-----
> From: Jerry Ingordo [mailto:gjingordo at optonline.net]
> Sent: Saturday, May 28, 2022 2:08 PM
> To: 'Jeffrey L. Bauman'; ':Boatanchors at mailman.qth.net'
> Subject: RE: [Boatanchors] Lafayette HA-350
> 
> Hi Jeff.
> I have an HA-350 and encountered the same problem with the manual 
> online,
> BAMA I think.  Also the AVC circuit was different so I purchased an 
> original
> Lafayette manual and it was the same as the BAMA manual.  I did scan 
> and
> post it online to the ebaman site.
> 
>
https://ebaman.com/remository/Home-Electronics/Ham-Radio/Lafayette/Lafaye
tte
> -HA-350.pdf/
> 
> You realize this is no help to you but your not alone.
> 
> If you should find some better information please let us know.
> 
> Good Luck with your project.
> Jerry
> W2JI