[Lafayette] HA-800B final

[Ron via Lafayette]

 Just wanted to thank Pete for his info on the 800B.

I finished it today. After cleaning, a realignment and painting the covers, it's pretty darn nice! Capacitors were OK. Checked a few and all were in spec.
Although the alignment instructions were incomplete, (I thought I was missing a page!) it was easy to figger out. As usual, MOST of the alignment points were spot on. However, the Mechanical Filter adjustments were pretty far off. Before, tuning SSB was slightly difficult. Now it's quite easy.
I've connected it to a Motorola mobile speaker and it sounds excellent.
I've had it on the W1AW/p station for about an hour and it's still loud and clear. I know the following may be hard to believe, but it hears almost exactly the same on weak signals as my babied Icom 761.Of course, this was just one quick test on 14 MHz. Same antenna A/B test with a coax switch. Antenna is a Mosley CL-33 up 95' fed with 5/8" hardline.....
Pretty good for $50....

ron
N4UE

 

 

-----Original Message-----
From: manualman <manualman at juno.com>
To: lafayette <lafayette at mailman.qth.net>
Cc: bonddaleena <bonddaleena at aol.com>
Sent: Mon, Sep 22, 2014 9:28 pm
Subject: Fw: [Lafayette] HA-800B



Answers in your text preceded by "***"
Pete, wa2cwa
 
----- Forwarded Message -----
From: Ron via Lafayette <lafayette at mailman.qth.net>
To: lafayette at mailman.qth.net, lafayetteradiocollectorsclub at yahoogroups.com
Date: Sun, 21 Sep 2014 17:52:38 -0400
Subject: [Lafayette] HA-800B
Message-ID: <8D1A3FD7ECE1753-2EC4-1475C at webmail-m159.sysops.aol.com>
 
I was wondering if anyone out there that owns one of these old girls would care to correspond.
I have several HA-600s, and a regular HA-800 and now two 800Bs. The most recent one has been through cosmetic restoration and it needs an alignment. It's pretty far off frequency.
Once on the bench, I'm going to check the caps with one of my ESR meters, calibrate the 100 KHz marker and do the alignment.

Anyone been through the alignment, especially "T1"?
This had me confused for a while, since it is:
1. never shown on the layout diagram
2. none of the boards are marked


*** HA-800 Series - That's correct. They never showed where T1 were located nor did they show where TR-1, FET2, FET2, and FET3 were located either. There's also several omissions on the schematic drawing including two wires coming from the remote socket that go no where. They actually connect across the secondary of the 500 ohm audio transformer.
 

The rest should be pretty easy.
Coupla things I wanted to mention: I replaced the line cord with a modern 3 wire job. I wanted to add either a BNC or Coax connector to the chassis. Boy, there is just a lack of space.
Lastly, what is up with the 'plate' covering what appears to be a 12 VDC connector in the back of the chassis?
 
 
*** The receiver can run on 12 volts DC or 110 volt AC. However, if you run it on 110 volt AC, DC voltage will appear on the pins of the 12 volt socket. The plate is kept in place over the socket opening to prevent accidental shorting of the pins when operating it with 110 volt AC.



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