I picked up a hallicrafters sx-24 receiver, that is missing the S- meter. Can use the radio without the meter, by bypassing the meter? thanks in advance.

A glance at the schematic looks like just jumper the S-meter out. This would keep the AVC line working.

:A glance at the schematic looks like just jumper the S-meter out. This would keep the AVC line working.
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Thanks Warren, I'll try that

:I picked up a hallicrafters sx-24 receiver, that is missing the S- meter. Can use the radio without the meter, by bypassing the meter? thanks in advance.
:
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Assuming that R5 is still present, you can just insulate the meter connector lugs and use the set as is. Meter calibration pot R5 provides conduction of the AVC voltage to the front end stage.

::I picked up a hallicrafters sx-24 receiver, that is missing the S- meter. Can use the radio without the meter, by bypassing the meter? thanks in advance.
::
:= = = = =
:
:Assuming that R5 is still present, you can just insulate the meter connector lugs and use the set as is. Meter calibration pot R5 provides conduction of the AVC voltage to the front end stage.

I will agree that the S-meter isn't necessary for the operation of the radio, but I think the meter measures the plate current of the tube, and high Voltage is present on the leads. Might want to watch out for that.
Lewis
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:::I picked up a hallicrafters sx-24 receiver, that is missing the S- meter. Can use the radio without the meter, by bypassing the meter? thanks in advance.
:::
::= = = = =
::
::Assuming that R5 is still present, you can just insulate the meter connector lugs and use the set as is. Meter calibration pot R5 provides conduction of the AVC voltage to the front end stage.
:
:
:
:I will agree that the S-meter isn't necessary for the operation of the radio, but I think the meter measures the plate current of the tube, and high Voltage is present on the leads. Might want to watch out for that.
:Lewis
::
:
:
this same radio, did not come with a speaker. The speaker came in a seperate container. the 500 and 5000 ohm speaker terminals on the receiver must mean that the speaker came with a output transformer. how can I figure out what transformer to use? Thanks.

::::I picked up a hallicrafters sx-24 receiver, that is missing the S- meter. Can use the radio without the meter, by bypassing the meter? thanks in advance.
::::
:::= = = = =
:::
:::Assuming that R5 is still present, you can just insulate the meter connector lugs and use the set as is. Meter calibration pot R5 provides conduction of the AVC voltage to the front end stage.
::
::
::
::I will agree that the S-meter isn't necessary for the operation of the radio, but I think the meter measures the plate current of the tube, and high Voltage is present on the leads. Might want to watch out for that.
::Lewis
:::
::
::
:this same radio, did not come with a speaker. The speaker came in a seperate container. the 500 and 5000 ohm speaker terminals on the receiver must mean that the speaker came with a output transformer. how can I figure out what transformer to use? Thanks.

Nick:
500 Ohm to voice coil transformers are very common...also a 70.7 Volt matching transformer is 500 Ohms if you have a 10 Watt tap. Try Radio Shack, they are expensive but have them in stock.
Lewis
:

:this same radio, did not come with a speaker. The speaker came in a seperate container. the 500 and 5000 ohm speaker terminals on the receiver must mean that the speaker came with a output transformer. how can I figure out what transformer to use? Thanks.
:
= = = = =

The set has an output transformer; it just has a nonstandard output impedance of 500 or 5000 ohms. According to the data sheet on the radio, the user is supposed to plug the speaker into the 5000 ohm port.
Either there was a matching transformer in the speaker or the speaker was of the high-impedance voice coil type, like some Philips hi-fi radios of the late 1950s. This was probably done to match the impedance of headphones, which were presumed to be the primary output device of a radio such as this.

If you can dig up a 1920s radio loudspeaker with high-impedance input (designed to replace headphones directly), that would probably work fine. Otherwise, since the needed matching transformer carries no DC current, you should find an audio output transformer intended for use in a low-power solid-state audio device to be suitable. This could be harvested from a junk set or purchased at Radio Shack. An exact input impedance match is not necessary; just get it in the thousand-ohm "ballpark".

::this same radio, did not come with a speaker. The speaker came in a seperate container. the 500 and 5000 ohm speaker terminals on the receiver must mean that the speaker came with a output transformer. how can I figure out what transformer to use? Thanks.
::
:= = = = =
:
:The set has an output transformer; it just has a nonstandard output impedance of 500 or 5000 ohms. According to the data sheet on the radio, the user is supposed to plug the speaker into the 5000 ohm port.
:Either there was a matching transformer in the speaker or the speaker was of the high-impedance voice coil type, like some Philips hi-fi radios of the late 1950s. This was probably done to match the impedance of headphones, which were presumed to be the primary output device of a radio such as this.
:
:If you can dig up a 1920s radio loudspeaker with high-impedance input (designed to replace headphones directly), that would probably work fine. Otherwise, since the needed matching transformer carries no DC current, you should find an audio output transformer intended for use in a low-power solid-state audio device to be suitable. This could be harvested from a junk set or purchased at Radio Shack. An exact input impedance match is not necessary; just get it in the thousand-ohm "ballpark".
:

::this same radio, did not come with a speaker. The speaker came in a seperate container. the 500 and 5000 ohm speaker terminals on the receiver must mean that the speaker came with a output transformer. how can I figure out what transformer to use? Thanks.
::
:= = = = =
:
:The set has an output transformer; it just has a nonstandard output impedance of 500 or 5000 ohms. According to the data sheet on the radio, the user is supposed to plug the speaker into the 5000 ohm port.
:Either there was a matching transformer in the speaker or the speaker was of the high-impedance voice coil type, like some Philips hi-fi radios of the late 1950s. This was probably done to match the impedance of headphones, which were presumed to be the primary output device of a radio such as this.
:
:If you can dig up a 1920s radio loudspeaker with high-impedance input (designed to replace headphones directly), that would probably work fine. Otherwise, since the needed matching transformer carries no DC current, you should find an audio output transformer intended for use in a low-power solid-state audio device to be suitable. This could be harvested from a junk set or purchased at Radio Shack. An exact input impedance match is not necessary; just get it in the thousand-ohm "ballpark".
:
Thanks guys