1R5 versus 1L6

5/16/2014 1:56:04 PMsteve sherman

The Zenith G503 "Universal" is a standard broadcast receiver that has a 1U4 RF stage and a 1L6 converter.
For standard broadcast isn't the 1R5 the usual converter choice?
Wasn't the 1R5 cheaper because it was a higher-volume tube?
I'm under the impression that the 1L6 is a higher bandwidth tube used in radios such as the Transoceanics.
Does the 1L6 have a technical advantage over the 1R5 for standard broadcast?

Steve

5/16/2014 2:21:05 PMRob K

:The Zenith G503 "Universal" is a standard broadcast receiver that has a 1U4 RF stage and a 1L6 converter.
:For standard broadcast isn't the 1R5 the usual converter choice?
:Wasn't the 1R5 cheaper because it was a higher-volume tube?
:I'm under the impression that the 1L6 is a higher bandwidth tube used in radios such as the Transoceanics.
:Does the 1L6 have a technical advantage over the 1R5 for standard broadcast?
:
: Steve
:
I have a Zenith H503 which had a 1L6 (that went into my G500 TO! I replaced with a 1R5 with pin 5 removed. I notice no difference in sound, quality or DXing with the 1R5. I have also used the 1R5 replacement in other broadcast radios with no problems.

5/16/2014 4:49:38 PMRich, W3HWJ

::The Zenith G503 "Universal" is a standard broadcast receiver that has a 1U4 RF stage and a 1L6 converter.
::For standard broadcast isn't the 1R5 the usual converter choice?
::Wasn't the 1R5 cheaper because it was a higher-volume tube?
::I'm under the impression that the 1L6 is a higher bandwidth tube used in radios such as the Transoceanics.
::Does the 1L6 have a technical advantage over the 1R5 for standard broadcast?
::
:: Steve
::
:I have a Zenith H503 which had a 1L6 (that went into my G500 TO! I replaced with a 1R5 with pin 5 removed. I notice no difference in sound, quality or DXing with the 1R5. I have also used the 1R5 replacement in other broadcast radios with no problems.
:
*******************

If I recall rightly, the 1L6 was developed for this Zenith receiver. The 1L6 will oscillate at a higher frequency; 1R5 is a different pin-out and may not work in the highest frequency band.

Rich

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5/16/2014 4:53:37 PMRich, W3HWJ

:::The Zenith G503 "Universal" is a standard broadcast receiver that has a 1U4 RF stage and a 1L6 converter.
:::For standard broadcast isn't the 1R5 the usual converter choice?
:::Wasn't the 1R5 cheaper because it was a higher-volume tube?
:::I'm under the impression that the 1L6 is a higher bandwidth tube used in radios such as the Transoceanics.
:::Does the 1L6 have a technical advantage over the 1R5 for standard broadcast?
:::
::: Steve
:::
::I have a Zenith H503 which had a 1L6 (that went into my G500 TO! I replaced with a 1R5 with pin 5 removed. I notice no difference in sound, quality or DXing with the 1R5. I have also used the 1R5 replacement in other broadcast radios with no problems.
::
: *******************
:
:If I recall rightly, the 1L6 was developed for this Zenith receiver. The 1L6 will oscillate at a higher frequency; 1R5 is a different pin-out and may not work in the highest frequency band.
:
:Rich
:
:**************************
:
More info here:

http://antiqueradios.com/forums/viewtopic.php?t=70410

Rich

^

5/16/2014 5:28:29 PMC Harris

::::The Zenith G503 "Universal" is a standard broadcast receiver that has a 1U4 RF stage and a 1L6 converter.
::::For standard broadcast isn't the 1R5 the usual converter choice?
::::Wasn't the 1R5 cheaper because it was a higher-volume tube?
::::I'm under the impression that the 1L6 is a higher bandwidth tube used in radios such as the Transoceanics.
::::Does the 1L6 have a technical advantage over the 1R5 for standard broadcast?
::::
:::: Steve
::::
:::I have a Zenith H503 which had a 1L6 (that went into my G500 TO! I replaced with a 1R5 with pin 5 removed. I notice no difference in sound, quality or DXing with the 1R5. I have also used the 1R5 replacement in other broadcast radios with no problems.
:::
:: *******************
::
::If I recall rightly, the 1L6 was developed for this Zenith receiver. The 1L6 will oscillate at a higher frequency; 1R5 is a different pin-out and may not work in the highest frequency band.
::
::Rich
::
::**************************
::
:More info here:
:
:http://antiqueradios.com/forums/viewtopic.php?t=70410
:
:Rich
Be careful as pin 5 of the 1R5 has an internal connection to the filament ground. If B+ is being fed to pin 5 of your 1L6 you could short it out.
C Harris

5/17/2014 11:09:11 AMsteve sherman

::::The Zenith G503 "Universal" is a standard broadcast receiver that has a 1U4 RF stage and a 1L6 converter.
::::For standard broadcast isn't the 1R5 the usual converter choice?
::::Wasn't the 1R5 cheaper because it was a higher-volume tube?
::::I'm under the impression that the 1L6 is a higher bandwidth tube used in radios such as the Transoceanics.
::::Does the 1L6 have a technical advantage over the 1R5 for standard broadcast?
::::
:::: Steve
::::
:::I have a Zenith H503 which had a 1L6 (that went into my G500 TO! I replaced with a 1R5 with pin 5 removed. I notice no difference in sound, quality or DXing with the 1R5. I have also used the 1R5 replacement in other broadcast radios with no problems.
:::
:: *******************
::
::If I recall rightly, the 1L6 was developed for this Zenith receiver. The 1L6 will oscillate at a higher frequency; 1R5 is a different pin-out and may not work in the highest frequency band.
::
::Rich
::
::**************************
::
:More info here:
:
:http://antiqueradios.com/forums/viewtopic.php?t=70410
:
:Rich
:
:
:^Rich,
Is the above address correct?

Thanks,
Steve
:

5/17/2014 11:03:45 AMsteve sherman

::The Zenith G503 "Universal" is a standard broadcast receiver that has a 1U4 RF stage and a 1L6 converter.
::For standard broadcast isn't the 1R5 the usual converter choice?
::Wasn't the 1R5 cheaper because it was a higher-volume tube?
::I'm under the impression that the 1L6 is a higher bandwidth tube used in radios such as the Transoceanics.
::Does the 1L6 have a technical advantage over the 1R5 for standard broadcast?
::
:: Steve
::
:I have a Zenith H503 which had a 1L6 (that went into my G500 TO! I replaced with a 1R5 with pin 5 removed. I notice no difference in sound, quality or DXing with the 1R5. I have also used the 1R5 replacement in other broadcast radios with no problems.
:

5/17/2014 11:07:17 AMsteve sherman

:::The Zenith G503 "Universal" is a standard broadcast receiver that has a 1U4 RF stage and a 1L6 converter.
:::For standard broadcast isn't the 1R5 the usual converter choice?
:::Wasn't the 1R5 cheaper because it was a higher-volume tube?
:::I'm under the impression that the 1L6 is a higher bandwidth tube used in radios such as the Transoceanics.
:::Does the 1L6 have a technical advantage over the 1R5 for standard broadcast?
:::
::: Steve
:::
::I have a Zenith H503 which had a 1L6 (that went into my G500 TO! I replaced with a 1R5 with pin 5 removed. I notice no difference in sound, quality or DXing with the 1R5. I have also used the 1R5 replacement in other broadcast radios with no problems.
::
:
:Rob,
The Transoceanics operate out to ~27 MHz. Did you actually use the 1R5 out to that frequency and did it perform as well as the 1L6?

Thanks,
Steve