add RCA DTF104B

content/documents/_index.md

@@ -3,5 +3,5 @@ description: This page contains a collection of high resolution scans of various
 keywords: [Documents]
 title: Documents
 menu: "main"
-weight: 4
+weight: 5
 ---

content/nomotron/_index.md

@@ -3,5 +3,5 @@ description: Nomotrons are counting tubes equipped with an extra shield that res
 keywords: [Nomotron]
 title: Nomotron
 menu: "main"
-weight: 2
+weight: 3
 ---

content/numitron/RCA-DTF104B/index.md

@@ -0,0 +1,95 @@
+---
+date: 2024-12-05
+title: RCA DTF104B
+categories:
+    - Numitron
+tags:
+    - RCA
+    - top-view
+---
+
+The DTF104B is a Numitron display tube produced by RCA. Internally, it is nearly identical to the more common DR2000, but it is designed to be read from the top rather than the side. A spot exists on the backplate where a left decimal point could have been included, but it lacks filaments and is therefore non-functional on this model. Its flat top gives the DTF104B a distinct look and helps reducing reflections from adjacent tubes.
+
+RCA and Apollo used the "DTF" prefix to denote experimental development tubes, suggesting that this model likely never went into mass production.
+
+RCA's Numitrons were typically rated for a minimum of 100,000 hours of operation, so it's likely this model can achieve similar longevity. As with all devices using incandescent filaments, their lifespan can be extended greatly by reducing stress from thermal expansion. This can be done by maintaining a small current through inactive filaments to prevent them from cooling completely. Additionally, lowering the general filament current can also have a positive effect on longevity.
+
+| Property          | Description    |
+|-------------------|----------------|
+| Manufacturer      | RCA            |
+| Time period       | Early 1970s    |
+| Digit height      | 15mm           |
+| Envelope diameter | ~30mm          |
+| Envelope height   | ~49mm          |
+| Socket            | B9A            |
+
+### References
+
+- [RCA DR2000 datasheet](https://www.tube-tester.com/sites/nixie/dat_arch/Numitron_RCA_01.pdf) ([Archive](https://web.archive.org/web/20240923193536/http://www.tube-tester.com/sites/nixie/dat_arch/Numitron_RCA_01.pdf))
+
+- [tube-tester.com](https://www.tube-tester.com/sites/nixie/data/dtf104b.htm) ([Archive](https://web.archive.org/web/20240616015026/https://www.tube-tester.com/sites/nixie/data/dtf104b.htm))
+
+- [industrialalchemy.org](https://www.industrialalchemy.org/articleview.php?item=829) ([Archive](https://web.archive.org/web/20240421194702/http://industrialalchemy.org/articleview.php?item=829))
+
+[![RCA DTF104B](assets/1.jpg)](assets/1.jpg)
+
+[![RCA DTF104B](assets/2.jpg)](assets/2.jpg)
+
+[![RCA DTF104B](assets/3.jpg)](assets/3.jpg)
+
+<table>
+    <tr>
+        <td>
+            <a href="assets/4.jpg">
+                <img src="assets/4.jpg">
+            </a>
+        </td>
+        <td>
+            <a href="assets/5.jpg">
+                <img src="assets/5.jpg">
+            </a>
+        </td>
+        <td>
+            <a href="assets/6.jpg">
+                <img src="assets/6.jpg">
+            </a>
+        </td>
+         <td>
+            <a href="assets/7.jpg">
+                <img src="assets/7.jpg">
+            </a>
+        </td>
+        <td>
+            <a href="assets/8.jpg">
+                <img src="assets/8.jpg">
+            </a>
+        </td>
+    </tr>
+    <tr>
+        <td>
+            <a href="assets/9.jpg">
+                <img src="assets/9.jpg">
+            </a>
+        </td>
+        <td>
+            <a href="assets/10.jpg">
+                <img src="assets/10.jpg">
+            </a>
+        </td>
+        <td>
+            <a href="assets/11.jpg">
+                <img src="assets/11.jpg">
+            </a>
+        </td>
+         <td>
+            <a href="assets/12.jpg">
+                <img src="assets/12.jpg">
+            </a>
+        </td>
+        <td>
+            <a href="assets/13.jpg">
+                <img src="assets/13.jpg">
+            </a>
+        </td>
+    </tr>
+</table>

content/numitron/_index.md

@@ -0,0 +1,7 @@
+---
+description: Numitrons utilize multiple incandescant filaments to represent digits and other symbols, similar to other types of segmented displays. The key advantage of Numitrons over Nixie tubes was that they did not require high voltages, allowing them to be driven directly by logic-level signals or cheap low voltage transistors.
+keywords: [Numitron]
+title: Numitron
+menu: "main"
+weight: 2
+---

content/other/_index.md

@@ -3,5 +3,5 @@ description: Before LCDs became widespread, various display technologies compete
 keywords: [Other]
 title: Other
 menu: "main"
-weight: 3
+weight: 4
 ---

hugo.toml

@@ -24,7 +24,7 @@ theme = 'slick'
     showRssLink = true
     showmetalinks = true
 
-    mainSections = ["nixie", "other", "nomotron", "documents"]
+    mainSections = ["nixie", "other", "nomotron", "documents", "numitron"]
 
 
 [sitemap]