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Author Topic: HALLICRAFTERS HT-32B  (Read 9821 times)
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iw5ci
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« on: August 26, 2011, 12:25:18 PM »

This is my last restoration project

It was 70% cosmetic restoration and 30% electric:

I repainted the chassis, washed all the radio , lubed cleaned.

I have replaced 4 condensers, 2 tubes and aligned the radio.

It works great and now look almost new.

before:


* ht003.jpg (225.46 KB, 1296x968 - viewed 824 times.)

* ht010.jpg (445.64 KB, 1296x968 - viewed 668 times.)

* ht012.jpg (288.32 KB, 1296x968 - viewed 702 times.)
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iw5ci
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« Reply #1 on: August 26, 2011, 12:27:33 PM »

after:


* ht016.jpg (282.76 KB, 1296x968 - viewed 722 times.)

* ht017.jpg (298.12 KB, 1296x968 - viewed 916 times.)

* ht018.jpg (190.63 KB, 1296x968 - viewed 866 times.)
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w3jn
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« Reply #2 on: August 26, 2011, 01:18:08 PM »

Very nice!  That was my first transmitter and is near and dear to my heart.  Thanks for sharing!
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KM1H
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« Reply #3 on: August 26, 2011, 07:45:44 PM »

Agree, very nice.

Mine came with 24LQ6's hacked in so that had to be fixed along with a lot of dirt, cabinet burn marks, Mickey Mouse mods, etc. It now is used with a SX-115 and NCL-2000 amp.

Carl
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K1JJ
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« Reply #4 on: August 26, 2011, 08:27:53 PM »

Nice looking HT-32B.    I owned one in 1966 and made a lot of AM contacts with it. Even thought of getting another one or maybe an HT-37.

There are some easy mods to make it sound truly hi-fi on AM.  Just bypass the ssb filter and inject hi-fi audio into the balanced modulator directly. Set the carrier and that's it.

Good luck.

Tom, K1JJ
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Use an "AM Courtesy Filter" to limit transmit audio bandwidth  +-4.5 KHz, +-6.0 KHz or +-8.0 KHz when needed.  Easily done in DSP.

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There's nothing like an old dog.
iw5ci
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« Reply #5 on: August 27, 2011, 12:59:03 PM »

I don't' know it can be a good am trasmitter , as it uses dsb... are those mods documented somewhere with some schemes?

I have to say i bought the HT32B to match SX-115 receiver , i also have an SX-101 matched with a HT32 (first series)...
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W7TFO
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« Reply #6 on: August 27, 2011, 01:22:16 PM »

Kudos for an excellent job saving yet another treasure.

73DG
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Just pacing the Farady cage...
K1JJ
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« Reply #7 on: August 27, 2011, 01:42:32 PM »

I don't' know it can be a good am trasmitter , as it uses dsb... are those mods documented somewhere with some schemes?


Chris, W2JBL and  Jeff, W2NBC have done AM mods to their HT-37's. Here's a link that may well apply to the HT-32B with some changes. At least the basic mod principles may be the same.

http://www.amwindow.org/tech/htm/ht37mods.htm

Both their rigs sound very Hi-Fi on AM.

It will give you somethong to start with.  Do a search here for HT-32 mods too. I noticed a few threads here too.

Tom, K1JJ
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Use an "AM Courtesy Filter" to limit transmit audio bandwidth  +-4.5 KHz, +-6.0 KHz or +-8.0 KHz when needed.  Easily done in DSP.

Wise Words : "I'm as old as I've ever been... and I'm as young as I'll ever be."

There's nothing like an old dog.
w3jn
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« Reply #8 on: August 27, 2011, 02:20:51 PM »

You'll need to bypass the crystal filter.  Make sure you switch BOTH ends out.  Feed line level audio right to the balanced modulator and disable the ALC.  Instant (almost) HIFI AM.
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