Author Topic: Has anyone modified a Kellogg handset using new guts?  (Read 234 times)

Offline RB

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Has anyone modified a Kellogg handset using new guts?
« on: November 26, 2019, 08:16:12 AM »
I have a Kellogg handset and cannot get much volume from the Rec.
I would like to update it using a newer Rec.
I have this Rec labeled 348, and think it may be an HA1 or 3 ???
Has anyone tried this?
Success???

Offline rdelius

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Re: Has anyone modified a Kellogg handset using new guts?
« Reply #1 on: November 26, 2019, 09:09:52 AM »
Make sure diaphram is not bent. Try turning it over . Try another diaphram, I have put modern capsules in these handsets but they are special ones from audiosears.

Offline HarrySmith

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Re: Has anyone modified a Kellogg handset using new guts?
« Reply #2 on: November 26, 2019, 09:55:40 AM »
I do not think those will fit. I saw some electret elements on eBay last week, they would probably work, very similar to the Audiosears Robby mentioned. You can probably find them at some electronic parts places also.
Harry Smith
ATCA 4434
TCI

"There is no try,
there is only
do or do not"

Offline LarryInMichigan

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Re: Has anyone modified a Kellogg handset using new guts?
« Reply #3 on: November 26, 2019, 10:05:58 AM »
The keys to getting a good volume of sound from such a receiver are the strength of the magnet and the ability of the diaphragm to move.  If the magnet is weak or the diaphragm is bent, too tight, too loose, or too close or too far from the coils, the sound will be weak.  Check the diaphragm to make sure it isn't bent and it is not pushing against any uneven surfaces on the handset or cap.  Try flipping the diaphragm.  If the magnet is weak, you might get some improvement by adding a small magnet or two.  Small, strong magnets can be bought for cheap at hardware stores.

Larry

Offline RB

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Re: Has anyone modified a Kellogg handset using new guts?
« Reply #4 on: November 26, 2019, 10:13:35 AM »
Thanks Guys!
I have tried flippin the d, chkin space, it is not bent, prob is the magnets.
Will look into audiosears

Offline HowardPgh

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Re: Has anyone modified a Kellogg handset using new guts?
« Reply #5 on: December 04, 2019, 04:57:09 PM »
Try tightening or loosening the receiver cap. Some times loosening it a little makes a difference. Make sure that the faces of the magnet in the coils are clean. Also check for bad connection or cold solder joint. The receiver element in your picture is Stromberg Carlson.
Howard

Offline dsk

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Re: Has anyone modified a Kellogg handset using new guts?
« Reply #6 on: December 05, 2019, 11:59:36 AM »
Not Kellog but looking quite equal  from Elektrisk Bureau, Norway, or Siemens Germany: Cutting out rings of normal paper to make spacers to put over or under the diaphram has worked for me, once I had to put in new magnets, I used IKEA door magnets, works fine.

On an old Western Electric handset the coils was ruined so I did put in a smaller receiver, soldering and gluing, turned out to be great, another one had broken carbon diaphram on the transmitter, I had to smash a transistorized transmitter and put in, worked, but to good sound.

dsk

Offline dsk

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Re: Has anyone modified a Kellogg handset using new guts?
« Reply #7 on: December 05, 2019, 12:47:45 PM »
One more thing, had an old CB phone with extremely faint sounds.  I moved the receiver to be across the primary wingdings (in series with a capacitor) and that made the sound much better.

That is a solution used by Kellogg grabaphone and gives a strange impedance, but still it was better. 

dsk