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6BN8/8BN8

amfone All Messages By This Member #82155 OK question. Can a 6BN8 be used in a 2B in place of a 8BN8 and if so what if any differences will occur? Has anyone tried this? Thanks Tim WB8UHZ
Jim Shorney All Messages By This Member #82167 The short answer is "no". Unless you like hum in the audio. Longer answer is here: ...as well as in discussions in this forum. On Wed, 22 Jan 2025 17:36:58 +0000 (UTC) "amfone via groups.io" <amfone20000@...> wrote: OK question. Can a 6BN8 be used in a 2B in place of a 8BN8 and if so what if any differences will occur? Has anyone tried this? Thanks Tim WB8UHZ -- 73 -Jim NU0C
Gary Follett All Messages By This Member #82169 Well, it seems to me to make sense to put in the resistor that Hallicrafters used since 6BN8 tubes are far more common than the 8BN8. In fact, I have half a dozen of 6BN8 tubes and zero 8BN8 tubes. Gary W0DVN toggle quoted message Show quoted text On Jan 22, 2025, at 7:16?PM, Jim Shorney via groups.io <jimNU0C@...> wrote: The short answer is "no". Unless you like hum in the audio. Longer answer is here: ...as well as in discussions in this forum. On Wed, 22 Jan 2025 17:36:58 +0000 (UTC) "amfone via groups.io" <amfone20000@...> wrote: OK question. Can a 6BN8 be used in a 2B in place of a 8BN8 and if so what if any differences will occur? Has anyone tried this? Thanks Tim WB8UHZ -- 73 -Jim NU0C
Jim Shorney All Messages By This Member #82170 I suppose that the 8BN8 would more likely be found in the television repair man's caddy. There are quite a few on eBay right now. On Wed, 22 Jan 2025 20:59:29 -0600 "Gary Follett via groups.io" <xntrick1948@...> wrote: I have half a dozen of 6BN8 tubes and zero 8BN8 tubes. -- 73 -Jim NU0C
Steve Wedge, W1ES/4 All Messages By This Member #82176 The 8-volt version costs quite a bit more than the 6-volt equivalent. ?As it was a one-and-done replacement for my personal 2-B, I didn’t mind paying the difference. ? If you do want to save, you can insert a series resistor. BTW, I didn’t really notice any hum with the 6BN8 in there, so it may not have been applicable to every radio. Steve Wedge, W1ES Time flies like an arrow. Fruit flies like a banana. toggle quoted message Show quoted text On Wed, Jan 22, 2025 at 10:20 PM, Jim Shorney via groups.io <jimNU0C@...> wrote: I suppose that the 8BN8 would more likely be found in the television repair man's caddy. There are quite a few on eBay right now. On Wed, 22 Jan 2025 20:59:29 -0600 "Gary Follett via groups.io" <xntrick1948@...> wrote: > I have half a dozen of 6BN8 tubes and zero 8BN8 tubes. -- 73 -Jim NU0C
Clint VE3CMQ All Messages By This Member #82182 I don't think you would have any problem with making the swap. If all the filaments are in series, the 2 volt difference would be spread over the entire string. The thing to check would be the filament current between the two as they could be significantly different. toggle quoted message Show quoted text -----Original Message----- From: [email protected] <[email protected]> On Behalf Of Jim Shorney via groups.io Sent: Wednesday, 22 January 2025 21:20 To: [email protected] Subject: Re: [DRAKE-RADIO] 6BN8/8BN8 I suppose that the 8BN8 would more likely be found in the television repair man's caddy. There are quite a few on eBay right now. On Wed, 22 Jan 2025 20:59:29 -0600 "Gary Follett via groups.io" <xntrick1948@...> wrote: I have half a dozen of 6BN8 tubes and zero 8BN8 tubes. -- 73 -Jim NU0C
amfone All Messages By This Member #82186 Thanks very much for all your reply's. Tim WB8UHZ On Thursday, January 23, 2025 at 10:52:34 AM EST, Clint VE3CMQ <ve6cmm@...> wrote: I don't think you would have any problem with making the swap.? If all the filaments are in series, the 2 volt difference would be spread over the entire string.? The thing to check would be the filament current between the two as they could be significantly different. toggle quoted message Show quoted text -----Original Message----- From: [email protected] <[email protected]> On Behalf Of Jim Shorney via groups.io Sent: Wednesday, 22 January 2025 21:20 To: [email protected] Subject: Re: [DRAKE-RADIO] 6BN8/8BN8 I suppose that the 8BN8 would more likely be found in the television repair man's caddy. There are quite a few on eBay right now. On Wed, 22 Jan 2025 20:59:29 -0600 "Gary Follett via groups.io" <xntrick1948@...> wrote: > I have half a dozen of 6BN8 tubes and zero 8BN8 tubes. -- 73 -Jim NU0C

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